| Botanical Name | Common Name | Authority |
| Abelmoschus esculentus | Okra | T |
| Abelmoschus spp. | Okra | T |
| Abies guatemalensis | Guatemal. fir | CITES |
| Abronia macrocarpa | Sand verbena | ESA |
| Abutilon eremitopetalum | | ESA |
| Abutilon menziesii | Ko'oloa'ula | ESA |
| Abutilon sandwicense | | ESA |
| Acacia nilotica | | NW |
| Acaena exigua | Liliwai | ESA |
| Acanthomintha duttoniiAcanthomintha obovata ssp. duttoniiAcanthoscyphus parishii v. goodmanianaAcanthosyris spp | | ESAESAESANW |
| Achnatherum hymenoidesAchuaria spp.Achyranthes muticaAchyranthes splendens v. rotundata | | FSARut.ESAESA |
| Acidosasa spp.Acmadenia spp. | | Poa.Rut. |
| Acradenia (= Luerssenidendron) spp.Achronychia spp.Acroptilon (= Centaurea) repens (= C. picris)Actinanthella spp.Actinocladum spp. | | Rut.Rut.NWNWPoa. |
| Adenandra spp.Adenophorus periens | Pendant kihi | Rut.ESA |
| Adiantum vivesii | | ES |
| Adiscanthus spp. | | Rut. |
| Aegilops spp. | | Poa. |
| Aegilopsis spp. | | Rut. |
| Aegle spp. | | Rut. |
| Aerangis ellisii (= elata, platyphylla) | | CITES |
| Aeschynomene virginica | | ESA-T |
| Afraegle | | Rut. |
| Agalinus acuta | | ESA |
| Agalinus spp. (Schrophulariaceae) | | NW |
| Agathosma spp. | | Rut. |
| Agave arizonica | Sandplain agave | ESA |
| Agave parviflora | Little princess agave | CITES |
| Agelanthus spp.Ageratina adenophoraAgeratina riparia | Crofton weed | NWNWNW |
| Agnesia spp.Agonandra spp.Agropyron cristatum | Wheatgrass | Poa.NWFSA-A |
| Agropyron desertorum | | FSA-A |
| Agropyron fragile | | FSA-A |
| Agrostis canina | Bentgrass | FSA-A |
| Agrostis capillaris | Bentgrass | FSA-A |
| Agrostis giganteaAgrostis spp. | Redtop | FSA-AFSA-A |
| Agrostis stolonifer v. palustris | | FSA-A |
| Alectra spp. | | NW |
| Alectryon macrococcus | Mahoe | ESA |
| Alepis spp. (=Elytranthe) | Mistletoe | NW |
| Allium cepa v. cepa | Onion | FSA-V |
| Allium fistulosum | Welsh onion | FSA-V |
| Allium munzii | Munz's onion | ESA |
| Allium porrum | Leek | FSA-V |
| Allium schoenoprasum | Chives | FSA-V |
| Almeidea spp. | | Rut. |
| Aloe albida | | CITES |
| Aloe albiflora | | CITES |
| Aloe alfredii | | CITES |
| Aloe bakeri | | CITES |
| Aloe bellatula | | CITES |
| Aloe calcairophila | | CITES |
| Aloe compressa v. rugosquamosa, schistophila, paucituberculata | | CITES |
| Aloe delphinensis | | CITES |
| Aloe descoingsii | | CITES |
| Aloe fragilis | | CITES |
| Aloe haworthioides (incl. v. aurantiaca) | | CITES |
| Aloe helenae | | CITES |
| Aloe laeta (incl. v. maniaensis) | | CITES |
| Aloe parallelifolia | | CITES |
| Aloe parvula | | CITES |
| Aloe pillansii | | CITES |
| Aloe polyphylla | Spiral aloe | CITES |
| Aloe rauhii | | CITES |
| Aloe suzannae | | CITES |
| Aloe versicolor | | CITES |
| Aloe vossii | | CITES |
| Alopecurus aequalis v. sonomensis | | ESA |
| Alopecurus arundinaceus | Foxtail | FSA-A |
| Alopecurus pratensis | | FSA-A |
| Alternanthera sessilis | Sessile joyweed | NW |
| Alysicarpus vaginalis | | FSA-A |
| Amaranthus brownii | | ESA |
| Amaranthus pumilus | | ESA-T |
| Ambrosia cheiranthifolia | | ESA |
| Ambrosia pumila | | ESA |
| Amorpha herbacea v. crenulata | Crenulated leadplant | ESA |
| Ampelocalamus spp. | Bamboo | Poa. |
| Amphianthus pusillus | | ESA-T |
| Amphorogyne spp. | | NW |
| Amsinckia grandiflora | Fiddleneck | ESA |
| Amsonia kearneyana | Kearney's blue star | ESA |
| Amyris spp. | | Rut. |
| Anacolosa spp. | | NW |
| Ancistrocactus (= Sclerocactus brevihamatus ssp. tobuschii) tobuschii | Fishhook cactus | ESA, CITES |
| Ancistrostylis spp. | | NW |
| Andreadoxa spp. | | Rut. |
| Andropogon gerardii v. gerardii | | FSA-A |
| Andropogon hallii | | FSA-A |
| Anethum graveolens | Dill | FSA-V |
| Angostura spp. | Angostura | Rut. |
| Anthobolus spp. | | NW |
| Anthoxanthum odoratum | | FSA-A |
| Antidaphne spp. | | NW |
| Apios priceana | | ESA-T |
| Apium graveolens v. dulce | Celery | FSA-V |
| Apium graveolens v. rapaceum | Celeriac | FSA-V |
| Apoclada spp. | | Poa. |
| Aptandra spp. | | NW |
| Arabis mcdonaldiana | McDonald's rock cress | ESA |
| Arabis serotina | Shalebarren rock cress | ESA |
| Arachis hypogaea | Peanut | FSA-A |
| Arachis spp. | Peanut | Q37 |
| Araucaria araucana | Monkey-puzzle tree | CITES |
| Arceuthobium spp. (Viscaceae) | | NW |
| Arctium lappa | Burdock | FSA-V |
| Arctomecon humilis | Dwarf Bear-poppy | ESA |
| Arctostaphylos confertiflora | Manzanita | ESA |
| Arctostaphylos glandulosa ssp. crassifolia | | ESA |
| Arctostaphylos hookeri v. ravenii (=pungens v. ravenii) | | ESA |
| Arctostaphylos morroensis | | ESA-T |
| Arctostyphylos myrtifolia | | ESA-T |
| Arctostyphylos pallida | | ESA-T |
| Arctotheca calendula | Capeweed | NW |
| Arenaria paludicola | Marsh sandwort | ESA |
| Argemone pleiacantha ssp. pinnatisecta | | ESA |
| Argyroxiphium kauense | Silversword | ESA |
| Argyroxiphium sandwicense ssp. | | ESA |
| Argyroxiphium sandwicense ssp. macrocephalum | | ESA-T |
| Argyroxiphium sandwicense ssp. sandwicense | | ESA |
| Ariocarpus spp. (incl. Neogomesia and Rosecactus spp) | Rock cactus | CITES |
| Aristida chaseae | | ESA |
| Aristida portoricensis | | ESA |
| Arrhenatherum elatius | Oatgrass | FSA-A |
| Artemisia ludoviciana | Sagewort | FSA-A |
| Arthrostylidium spp. | Bamboo | Poa. |
| Arundinaria spp. | Cane reed | Poa. |
| Asclepias meadii | Milkweed | ESA-T |
| Asclepias welshii | | ESA-T |
| Asimina tetramera | Pawpaw | ESA |
| Asparagus officinalis | Asparagus | FSA-A |
| Asphodelus cerasifer | | NARGS |
| Asphodelus fistulosus | | NW |
| Asphodelus fistulosus | Onionweed | NW |
| Asplenium fragile v. insulare | | ESA |
| Asplenium scolopendrium v. americanum | | ESA |
| Asterolasia spp. | | Rut. |
| Astragalus albens | Cushenbury milk-vetch | ESA |
| Astragalus ampullarioides | Shivwitz milk-vetch | ESA |
| Astragalus applegatei | Applegate's milk-vetch | ESA |
| Astragalus bibullatus | Gutheriel's (Pynel's) ground plum | ESA |
| Astragalus brauntonii | | ESA |
| Astragalus cicer | Milkvetch | ESA, FSA-A |
| Astragalus clarianus | | ESA |
| Astragalus cremnophylax v. cremnophylax | Sentry milk-vetch | ESA |
| Astragalus desereticus | | ESA-T |
| Astragalus holmgreniorum | | ESA |
| Astragalus humillimus | Manco's milk-vetch | ESA |
| Astragalus jaegerianus | Mountain milk-vetch | ESA |
| Astragalus lentiginosus v. coachellae | Coachella Valley m-v | ESA |
| Astragalus lentiginosus v. piscinensis | Locoweed | ESA-T |
| Astragalus magdalenae v. peirsonii | | ESA-T |
| Astragalus montii (=limnocharis v. montii) | | ESA-T |
| Astragalus osterhoutii | | ESA |
| Astragalus phoenix | | ESA-T |
| Astragalus pycnostachyus v. lanossimus | Marsh milk-vetch | ESA |
| Astragalus robbinsii v. jesupi | | ESA |
| Astragalus tener v. titi | Coastal dunes milk-vetch | ESA |
| Astragalus tricarinatus | Triple-ribbed milk-vetch | ESA |
| Astrophytum (= Echinocactus) asterias | Star cactus | ESA, CITES |
| Atalantia spp. | | Rut. |
| Athroostachys spp. | | Poa. |
| Atkinsonia spp. | | Lor. |
| Atractantha spp. | | Poa. |
| Atriplex canescens | Saltbush | FSA-A |
| Atriplex coronata v. notatior | Crownscale | ESA |
| Auerodendron pauciflorum | | ESA |
| Aulonemia spp. | | Poa. |
| Aureolaria spp. | | NW |
| Avena byzantina | Oat | FSA-A |
| Avena sativa | | FSA-A |
| Avena sterilis | Wild oat | NW |
| Axonopus fissifolius | Carpetgrass | FSA-A |
| Ayenia limitaris | | ESA |
| Azola pinnata | Mosquito fern | NW |
| Aztekium ritteri | | CITES |
| Baccharis spp. | | ESA-T |
| Backbergia (=Pachycereus) militaris | Teddy-bear cactus | CITES |
| Bakerella spp. | | NW |
| Balanophoraceae | | NW |
| Balfourodendron spp. | | Rut. |
| Balmea stormiae | | CITES |
| Balsamocitrus spp. | | Rut. |
| Bambusa spp. | | Poa. |
| Banara vanderbiltii | | ESA |
| Baptisia arachnifera | Hairy rattleweed | ESA |
| Barathranthus spp. | | NW |
| Barbarea verna | Upland cress | FSA-V |
| Barosma spp. | | Rut. |
| Bartsia spp. | | NW |
| Bashania (=Arundinaria) spp. | | Poa. |
| Bassia prostrata | | FSA-A |
| Bauerella (=Sarcomelicope) spp. | | Rut. |
| Bdallophytum ssp. | | NW |
| Benthamina spp. | Mistletoe | NW |
| Berberis nevinii | | ESA |
| Berberis pinnata ssp. insularis | | ESA |
| Berberis sonnei | | Q37, ESA |
| Berberis spp. | | Q37 |
| Bergera spp. | Curry leaf | Rut. |
| Berhautia spp. | | NW |
| Beta vulgaris ssp. vulgaris | Beet; Swiss chard | FSA-V |
| Betula uber | VA birch | ESA-T |
| Bidens micrantha ssp. kalealaha | | ESA |
| Bidens wiebkei | | ESA |
| Blennosperma bakeri | Sonoma sunshine | ESA |
| Boechera hoffmannii | Rock cress | ESA |
| Boenninghausenia spp. | Albaflora | Rut. |
| Boltonia decurrens | | ESA-T |
| Bonamia grandiflora | | ESA-T |
| Bonamia menziesii | | ESA |
| Bonia (=Bambusa) spp. | | Poa. |
| Boninia spp. | | Rut. |
| Borinda spp. | Bamboo | Poa |
| Boronella spp. | | Rut. |
| Boronia spp. | | Rut. |
| Borreria (= Spermacoce) alata | | NW |
| Boschniakia spp. | Poque | NW |
| Bosistoa spp. | | Rut. |
| Botanical Name | Common Name | Authority |
| Bothriochloa ischaemum | Yellow bluestem | FSA-A |
| Bottegoa spp. | | Rut. |
| Bouchardatia spp. | Union nut | Rut. |
| Bouteloua curtipendula | Side oats | FSA-A |
| Bouteloua dactyloides | Buffalograss | FSA-A |
| Bouteloua gracilis | Blue oats | FSA-A |
| Brachlaria ramosa | Millet | FSA-A |
| Brachystachyum (= Semiarundinaria) spp. | | Poa. |
| Brassica juncea | India mustard | FSA-A, FSA-V |
| Brassica napus (vars. annua, biennis) | Rape | FSA-A |
| Brassica napus v. napobrassica | | FSA-A |
| Brassica napus v. pabularia | Siberian kale | FSA-A |
| Brassica nigra | Black mustard | FSA-A |
| Brassica oleracea v. acephala | | FSA-V |
| Brassica oleracea v. alboglabra | | FSA-V |
| Brassica oleracea v. botrytis | Broccoli, cauliflower, etc. | FSA-V |
| Brassica oleracea v. gemmifera | | FSA-V |
| Brassica oleracea v. gongylodes | | FSA-V |
| Brassica periviridis v. periviridis | | FSA-V |
| Brassica rapa ssp. campestris | | FSA-V |
| Brassica rapa ssp. chinensis | Pak-choi | FSA-V |
| Brassica rapa ssp. pekinensis | | FSA-V |
| Brassica rapa ssp. rapa | Turnip | FSA-A, FSA-V |
| Brassica rapa ssp. silvestris | Turnip rape | FSA-A |
| Brighamia insignis | | ESA |
| Brighamia rockii | | ESA |
| Brodiaea filifolia | | ESA-T |
| Brodiaea pallida | | ESA-T |
| Bromus arvensis | Field brome | FSA-A |
| Bromus biebersteinii | | FSA-A |
| Bromus catharticus | Rescuegrass | FSA-A |
| Bromus horeaceus | Soft chess | FSA-A |
| Bromus inermis | Smooth brome | FSA-A |
| Bromus marginatus | Mountain brome | FSA-A |
| Buchloe dactyloides | Buffalograss | FSA-A |
| Buchnera spp. | | NW |
| Buckleya spp. | | NW |
| Bungea spp. | | NW |
| Burkillanthus spp. | | Rut. |
| Burnabambus (= Sinarundinaria) ssp. | Bamboo | Poa. |
| Butania (= Sinarundinaria) ssp. | Bamboo | Poa. |
| Buttonia spp. | | NW |
| Buxus vahlii | Vahl's boxwood | ESA |
| Caesalpinia kavaiense | Uhiuhi | ESA |
| Calamagrostis spp. | | Poa. |
| Callicarpa ampla | Capa rosa | ESA |
| Callirhoe scabriuscula | Texas poppy-mallow | ESA |
| Calochortus tiburonensis | Mariposa lily | ESA-T |
| Calodendrum spp. | | Rut. |
| Calyptonoma rivalis | | ESA-T |
| Calyptranthes thomasiana | | ESA |
| Calystegia stebbinsii | | ESA |
| Camissonia benitensis | | ESA-T |
| Campanula rapunculoides | | NARGS |
| Campanula robinsiae | Bellflower | ESA |
| Canavalia molokaiensis | Awikiwiki | ESA |
| Cannabis sativa | Marajuana, hemp | CBP-controlled |
| Cansjera spp. | | NW |
| Capsicum spp. | Pepper | FSA-V |
| Cardamine micranthera | Bittercress | ESA |
| Carex albida | White sedge | ESA |
| Carex lutea | Golden sedge | ESA |
| Carex specuicola | Navajo sedge | ESA-T |
| Carthamus oxyacantha | Wild safflower | NW |
| Carthamus tinctoria | Safflower | FSA-V |
| Casimiroa spp. | | Rut. |
| Cassia (= Chamaecrista) mirabilis | | ESA |
| Cassytha spp. | | NW |
| Castanea spp. | Horse chestnut | T |
| Castilleja spp. | Indian paintbrush | NW |
| Catesbaea melanocarpa | | ESA |
| Cathariostachys spp | Bamboo | Poa. |
| Cathedra spp. | | NW |
| Caulerpa taxifolia | | NW |
| Ceanothus ferrisae | | ESA |
| Ceanothus ophiochilus | | ESA-T |
| Cecarria spp. | | NW |
| Cedrelopsis spp. | | Rut. |
| Cenchrus agrimonioides | Kamanomano | ESA |
| Cenchrus cillaris | Buffelgrass | FSA-V |
| Centaurea cyaneus | Bachelor's buttons | FSA-V |
| Centaurium namophilum | Centaury | ESA |
| Centaurium sebaeoides | Awiwi | ESA |
| Centranthera spp. | | Parasitic |
| Centranthera spp. | | NW |
| Cephalocereus militaris | Cactus | CITES |
| Cephalostachyum spp. | Rice bamboo | Poa. |
| Ceratozamia spp. | | CITES |
| Cercocarpus traskiae | Mountain mahogany | ESA |
| Cereus (= Pilosocereus) robinii | | ESA |
| Cervantesia spp. | | NW |
| Chamaecrista glandulosa v. mirabilis | | ESA |
| Chamaesyce (= Euphorbia) deppeana | | ESA |
| Chamaesyce celastroides v. kaenana | | ESA |
| Chamaesyce deltoidea ssp. deltoidea | | ESA |
| Chamaesyce garberi | | ESA-T |
| Chamaesyce halemanui | | ESA |
| Chamaesyce herbstii | | ESA |
| Chamaesyce hooveri | | ESA-T |
| Chamaesyce kuwaleana | | ESA |
| Chamaesyce rockii | | ESA |
| Chamaesyce skottsbergii v. kalaeloana | | ESA |
| Champereia spp. | | NW |
| Chaunochiton spp. | False olive | NW |
| Chicorium intybus | Chicory | FSA-V |
| Chigua spp. | | CITES |
| Chimonobambusa spp. | Bamboo | Poa. |
| Chimonocalamus (=Sinoarundinaria) spp. | Bamboo | Poa. |
| Chionachne spp. | | Poa. |
| Chionanthus pygmaeus | Pygmy fringe tree | ESA |
| Chlamydophytum spp. | | NW |
| Chloothamnus (= Nastus) spp. | Bamboo | Poa. |
| Chloris gayana | Rhodes grass | FSA-A |
| Chlorogalum purpureum | Purple amole | FSA-A |
| Choisya spp. | Mex. orange | Rut. |
| Choretrum spp. | Sour bush | NW |
| Chorilaena spp. | | Rut. |
| Choristegeres spp. | | NW |
| Chorizanthe howellii | Spineflower | ESA |
| Chorizanthe orcuttiana | | ESA |
| Chorizanthe pungens v. hartwegiana | | ESA |
| Chorizanthe pungens v. pungens | | ESA-T |
| Chorizanthe robusta v. hartwegii | | ESA |
| Chorizanthe robusta v. robusta | | ESA |
| Chorizanthe valida | | ESA |
| Christisonia spp. | | NW |
| Chryopsis (= Pityopsis) ruthii | | ESA |
| Chrysalidocarpus decipiens | | CITES |
| Chrysanthemum parthenium | Feverfew | NARGS |
| Chrysopogon aciculatus | Pilipillula | NW |
| Chrysopsis (=Heterotheca) floridana | | ESA |
| Chrysopsis (=Pityopsis =Heterotheca) ruthii | | ESA |
| Chusquea spp. | | Poa. |
| Cicer arietinum | Chickpea | FSA-V |
| Cichorium endivia | Endive | FSA-V |
| Cirsium fontinale v. fontinale | Thistle | ESA |
| Cirsium fontinale v. obispoense | | ESA |
| Cirsium hydrophilum v. hydrophilum | | ESA |
| Cirsium pitcheri | | ESA-T |
| Cirsium scariousum v. citrinum | | ESA |
| Cirsium vinaceum | | ESA-T |
| Cistanche deserticola | | NW |
| Cistanche spp. | | NW |
| Citremocitrus (=Eremocitrus) spp. | | Rut. |
| Citrofortunella spp. | | Rut. |
| Citromicrocitrus spp. | | Rut. |
| Citrullus lanatus (incl. v. citroides) | | FSA-V |
| Citrullus lanatus (incl. v. lanatus) | | FSA-V |
| Citrus spp. | | Rut. |
| Cladocolea spp. | | NW |
| Cladomyza spp. | | NW |
| Cladonia perforata | | ESA |
| Clarkia franciscana | | ESA |
| Clarkia imbricata | | ESA |
| Clarkia speciosa ssp. immaculata | | ESA |
| Clarkia springvillensis | | ESA-T |
| Clausena spp. | | Rut. |
| Clausenopsis (= Fagaropsis) spp. | | Rut. |
| Clavinodum (= Arundinaria) spp. | | Poa. |
| Clematis morefieldii | Leatherflower | ESA |
| Clematis socialis | | ESA |
| Clermontia drepanomorpha | Oha wai | ESA |
| Clermontia lindseyana | | ESA |
| Clermontia oblongifolia ssp. brevipes | | ESA |
| Clermontia oblongifolia ssp. mauiensis | | ESA |
| Clermontia peleana | | ESA |
| Clermontia pyrularia | | ESA |
| Clermontia samuelii | | ESA |
| Clevelandia spp. | | NW |
| Clitoria fragrans | | ESA-T |
| Clymenia spp. | | Rut. |
| Cneoridium spp. | | Rut. |
| Cneorum spp. | Spurge olive | Rut. |
| Cocos nucifera | Coconut | Q37 |
| Coffea spp. | Coffee | Q37 |
| Coix spp. | Job's tears | Q37 |
| Colanthelia spp. | | Poa. |
| Coleonema spp. | | Rut. |
| Coloradoa (= Sclerocactus, Ferrocactus, Pediocactus) mesae-verdae | | CITES |
| Colpoon spp. | Bark Bosch | NW |
| Colubrina oppositifolia | Kauila | ESA |
| Comandra spp. | Toadflax | NW |
| Commelina benghalensis | Bengal dayflower | NW |
| Comptonella spp. | | Rut. |
| Conchocarpus spp. | | Rut. |
| Conopholis spp. | | NW |
| Conradina brevifolia | Rosemary | ESA |
| Conradina etonia | | ESA |
| Conradina glabra | | ESA |
| Conradina verticillata | | ESA-T |
| Convolvulus arvensis | Bindweed | NARGS |
| Cordia bellonis | | ESA |
| Cordylanthus maritimus ssp. maritimus | | NW |
| Cordylanthus mollis ssp. mollis | | ESA |
| Cordylanthus palmatus | | ESA |
| Cordylanthus spp. | Bird's beak | NW |
| Cordylanthus tenuis ssp. capillaris | | ESA |
| Cornutia obovata | | ESA |
| Coronilla (=Securigera) varia | Crownvetch | FSA-A |
| Correa spp. | | Rut. |
| Corynea spp. | | NW |
| Coryphantha (= Escobaria) minima | Cory cactus | ESA |
| Coryphantha (= Escobaria) robbinsorum | | ESA-T |
| Coryphantha (= Escobaria) sneedii | | CITES |
| Coryphantha ramillosa | | ESA-T |
| Coryphantha scheeri v. robustispina | | ESA |
| Coryphantha werdermannii (densispina) | | CITES |
| Cowania (= Purshia) subintegra | | ESA |
| Crambe abyssinica | Crambe | FSA-A |
| Cranichis ricartii | | ESA |
| Crescentia portoricensis | | ESA |
| Criciuma spp. | | Poa. |
| Crotalaria avonensis | | ESA |
| Crotalaria brevidens v. intermedia | | FSA-A |
| Crotalaria juncea | | FSA-A |
| Crotalaria lanceolata | | FSA-A |
| Crotalaria pallida | | FSA-A |
| Crotalaria spectabilis | | FSA-A |
| Crowea spp. | | Rut. |
| Crupina vulgaris | Crupina | NW |
| Cryptantha crassipes | Cat's eye | ESA |
| Ctenitis squamigera | | ESA |
| Cucumis anguria | Gherkin | FSA-V |
| Cucumis melo | Melon | FSA-V |
| Cucumis sativus v. sativus | Cucumber | FSA-V |
| Cucurbita okeechobeensis v. okeechobeensis | | ESA |
| Cucurbita pepo, maxima | Pumpkin, squash | FSA-V |
| Cupressus goveniana (incl. v. abramsiana) | | ESA |
| Curupira spp. | | NW |
| Cuscuta spp. (some exceptions) | Dodder | NW |
| Cuscutaceae | | NW |
| Cusparia spp. | | Rut. |
| Cyamopsis tetragonoloba | Guar | FSA-A |
| Cyanea (= Rollandia) crispa | | ESA |
| Cyanea acuminata | Haha | ESA |
| Cyanea asarifolia | | ESA |
| Cyanea copelandii ssp. copelandii | | ESA |
| Cyanea copelandii ssp. haleakalaensis | | ESA |
| Cyanea dunbariae | | ESA |
| Cyanea glabra | | ESA |
| Cyanea grimesiana ssp. grimesiana | | ESA |
| Cyanea grimesiana ssp. obatae | | ESA |
| Cyanea hamatiflora ssp. carlsonii | | ESA |
| Cyanea hamatiflora ssp. hamatiflora | | ESA |
| Cyanea humboldtiana | | ESA |
| Cyanea koolauensis | | ESA |
| Cyanea lobata | | ESA |
| Cyanea longiflora | | ESA |
| Cyanea macrostegia ssp. gibsonii | | ESA |
| Cyanea mannii | | ESA |
| Cyanea mceldowneyi | | ESA |
| Cyanea pinnatifida | | ESA |
| Cyanea platyphylla | | ESA |
| Cyanea procera | | ESA |
| Cyanea remyi | | ESA |
| Cyanea rivularis | | ESA |
| Cyanea shipmannii | | ESA |
| Cyanea stictophylla | | ESA |
| Cyanea st-johnii | | ESA |
| Cyanea superba | | ESA |
| Cyanea truncata | | ESA |
| Cyanea undulata | | ESA |
| Cyathea dryopteroides | Elfin tree | ESA |
| Cycas beddomei | | CITES |
| Cycladenia jonesii (humilis) | | ESA-T |
| Cycniopsis spp. | | NW |
| Cycnium spp. | | NW |
| Cynara cardunculus | Artichoke | FSA-V |
| Cynodon dactylon (incl. v. aridus) | Bermudagrass | FSA-A |
| Cynomorium spp. | Suo yang | NW |
| Cynosurus cristata | Crested dog-tail | FSA-A |
| Cyperus fauriei | | ESA |
| Cyperus trachysanthos | | ESA |
| Cyrtandra crenata | | ESA |
| Cyrtandra cyaneoides | | ESA |
| Cyrtandra dentata | | ESA |
| Cyrtandra giffardii | | ESA |
| Cyrtandra limahuliensis | | ESA-T |
| Cyrtandra munroi | | ESA |
| Cyrtandra polyantha | | ESA |
| Cyrtandra subumbellata | | ESA |
| Cyrtandra tintinnabula | | ESA |
| Cyrtandra viridiflora | | ESA |
| Cyrtochloa spp. | Bamboo | Poa. |
| Cytinus spp. | | Parasitic |
| Dactylanthus spp. | | NW |
| Dactyliophora spp. | | NW |
| Dactylis glomerata | Orchardgrass | FSA-V |
| Daenikera spp. | Sandalwoods | NW |
| Dalbergia nigra | | CITES |
| Dalea (= Petalostemmon) foliosa | | ESA |
| Daphnopsis helleriana | | ESA |
| Dasistoma spp. | | NW |
| Daucus carota ssp. sativus | Carrot | FSA-V |
| Decagonocarpus spp. | Citrus | Rut. |
| Decaisnina spp. | Mistletoes | NW |
| Decaryochloa spp. | | Poa. |
| Decatropis spp. | Citrus | Rut. |
| Decazyx spp. | Citrus | Rut. |
| Deeringothamnus pulchellus | Pawpaw | ESA |
| Deeringothamnus rugelii | | ESA |
| Deinandra (= Hemizonia) conjugens | Tarplant | ESA-T |
| Deinandra increscens ssp. villosa | | ESA |
| Delissea rhytidosperma | | ESA |
| Delissea subcordata | | ESA |
| Delissea undulata | | ESA |
| Delphinium bakeri | Larkspur | ESA |
| Delphinium luteum | | ESA |
| Delphinium variegatum ssp. kinkiense | | ESA |
| Dendrobium cruentum | | CITES |
| Dendrocalamopsis (= Bambusa) spp. | Bamboo | Poa. |
| Dendrocalamus spp. | Bamboo | Poa. |
| Dendrochloa (= Schizostachyum) spp. | | Poa. |
| Dendromyza spp. | | NW |
| Dendrophthoe spp. | | NW |
| Dendropthora spp. | | NW |
| Dendrotrophe spp. | | NW |
| Desmaria spp. | | NW |
| Desmodium tortuosum | Beggarweed | FSA-A |
| Desmotes spp. | | Rut. |
| Dicerandra christmanii | | ESA |
| Dicerandra cornutissima | | ESA |
| Dicerandra frutescens | Scrub mint | ESA |
| Dicerandra immaculata | | ESA |
| Dichondra repens | | FSA-A |
| Dictamnus spp. | Gasplant | Rut. |
| Dicymanthes spp. | Fern | NW |
| Diellia erecta | | ESA |
| Diellia falcata | | ESA |
| Diellia pallida | | ESA |
| Diellia unisora | | ESA |
| Digitaria abyssinica | African couchgrass | NW |
| Digitaria velutina | Fingergrass | NW |
| Dinochloa spp. | | Poa. |
| Diosma spp. | | Rut. |
| Diphasia spp. | | Rut. |
| Diplatia spp. | Mistletoe | NW |
| Diplazium molokaiense | | ESA |
| Diplolaena spp. | | Rut. |
| Discocactus spp. | | CITES |
| Distichella spp. | | NW |
| Distrianthes spp. | | NW |
| Ditepalanthus spp. | | NW |
| Dodecahema leptoceras | Spineflower | ESA |
| Douradoa spp. | | NW |
| Dracaena hawaiiensis | | ESA |
| Drepanostachyum (= Sinarundinaria) spp. | Bamboo | Poa. |
| Drymaria arenarioides | Lightning weed | NW |
| Dubautia herbstobatae | | ESA |
| Dubautia latifolia | | ESA |
| Dubautia pauciflorula | | ESA |
| Dubautia plantanginea spp. humilis | | ESA |
| Dudleya abramsii ssp. parva | | ESA-T |
| Dudleya cymosa ssp. marcescens | | ESA-T |
| Dudleya nesiotica | | ESA-T |
| Dudleya setchellii | | ESA |
| Dudleya stolonifera | Liveforever | ESA, CITES |
| Dudleya traskiae | Liveforever | ESA, CITES |
| Dudleya verityi | | ESA-T |
| Dufrenoya spp. | | NW |
| Dulacia spp. | | NW |
| Dutaillyea spp. | | Rut. |
| Dypsis decipiens | | CITES |
| Echinacea laevigata | Coneflower | ESA |
| Echinacea tennesseensis | TNconeflower | ESA |
| Echinocactus horizonthalonius v. nicholii | | ESA |
| Echinocereus (= Wilcoxii) schmollii (incl W. nerispina) | | CITES |
| Echinocereus chisosensis v. chisosensis | | ESA-T |
| Echinocereus davisii | | ESA |
| Echinocereus fendleri v. hempelii | | ESA |
| Echinocereus ferreirianus ssp. lindsayi | | CITES |
| Echinocereus reichenbachii v. fitchii | | ESA |
| Echinocereus triglochidiatus v. arizonicus | | ESA |
| Echinocereus viridiflorus v. davisii | | ESA |
| Echinochloa spp. | | Poa. |
| Echinomastus (= Sclerocactus) mariposensis | | CITES |
| Echinomastus (= Sclerocactus) spp. | | CITES |
| Echinomastus acunensis (= Sclerocactus erectocentrus) | | CITES |
| Echinomastus krausei (= Sclerocactus erectocentrus) | | CITES |
| Echinopsis pachanoi | | CBP-controlled |
| Echinospardium horridum | | NARGS |
| Echoniocactus (=Pediocactus) sileri | | CITES |
| Ehrharta calycina | Veldtgrass | FSA-A |
| Eichornia azurea | Water hyacinth | NW |
| Elaphoglossum serpens | | ESA |
| Eleusine spp. | | Poa. |
| Elymus canadensis | Wildrye | FSA-A |
| Elymus elymoides | Squirreltail | FSA-A |
| Elymus lanceolatus ssp. lanceolatus | Wheatgrass | FSA-A |
| Elymus trachycaulus | | FSA-A |
| Elytranthe spp. | | NW |
| Elytrigia (= Agropyron) repens | | NW |
| Elytrigia intermedia | Wheatgrass | FSA-A |
| Elytrostachys spp. | Bamboo | Poa. |
| Emelianthe spp. | | NW |
| Emex australis | Three-cornered jack | NW |
| Emex spinosa | Devil's thorn | NW |
| Empleuridium spp. | | Rut. |
| Enceliopsis nudicaulis v. corrugata | | ESA-T |
| Encephalartos spp. | | CITES |
| Encephalocarpus (= Pelecyphora) spp. | | CITES |
| Englerina spp. | | NW |
| Epifagus spp. | Beechdrops | NW |
| Eragrostis curvula | | FSA-A |
| Eragrostis fosbergii | Love grass | ESA |
| Eragrostis trichodes | | FSA-A |
| Eremalche parryi ssp. kernensis | Mallow | ESA |
| Eremocaulon spp. | Bamboo | Poa. |
| Eremocitrus | | Rut. |
| Eremogone ursina | Sandwort | ESA-T |
| Eremolepis spp. | Mistletoe | NW |
| Erianthemum spp. | Mistletoe | NW |
| Eriastrum densifolium ssp. sanctorum | Wooly-star | ESA |
| Eriastrum hooveri | | ESA-T |
| Erigeron decumbens v. decumbens | | ESA |
| Erigeron maguirei | | ESA-T |
| Erigeron parishii | | ESA-T |
| Erigeron rhizomatus | | ESA-T |
| Eriodictyon altissimum | Mountain balm | ESA |
| Eriodictyon capitatum | Yerba santa | ESA |
| Eriogonum apricum (incl. v. prostratum) | Buckwheat | ESA |
| Eriogonum gypsophilum | | ESA-T |
| Eriogonum kennedyi v. austromontanum | | ESA-T |
| Eriogonum longifolium v. gnaphalifolium | | ESA-T |
| Eriogonum ovalifolium v. vineum | | ESA |
| Eriogonum ovalifolium v. williamsiae | | ESA |
| Eriogonum pelinophilum | | ESA |
| Eriophyllum latilobum | Woolly sunflower | ESA |
| Eriostemon spp. | | Rut. |
| Erodium cicutarium | | FSA-A |
| Eryngium aristulatum v. parishii | | ESA |
| Eryngium constancei | | ESA |
| Eryngium cuneifolium | Snakeroot | ESA |
| Erysimum capitatum v. angustatum | | ESA |
| Erysimum menziesii | Wallflower | ESA |
| Erysimum teretifolium | Ben Lomond wallflower | ESA |
| Erythrochiton spp. | | Rut. |
| Erythronium propullans | Dwarf troutlily | ESA |
| Erythroxylum coca | Coca | CBP-controlled |
| Escobaria leei | | CITES |
| Escobaria neilleae (= E. minima) | | CITES |
| Escobaria sneedii (incl. v. leei) | | CITES |
| Escobedia spp. | | NW |
| Esenbeckia spp. | | Rut. |
| Esterhazya spp. | | NW |
| Eubrachion spp. | Tapeworm-plant | NW |
| Euchaetis spp. | | Rut. |
| Euchlaena spp. (from many countries) | | Poa. |
| Eugenia haematocarpa | Uvillo | ESA |
| Eugenia koolauensis | | ESA |
| Eugenia woodburyana | | ESA |
| Euodia spp. | Evodia | Rut. |
| Euphorbia (= Chamesyce) deltoidea | | ESA |
| Euphorbia (= Chamesyce) deppeana | | ESA |
| Euphorbia ambovombensis | Spurges | CITES |
| Euphorbia capsaintemariensis (= decaryi c.) | | CITES |
| Euphorbia cremersii (incl: f. viridifolia; v. rakotozafyi) | | CITES |
| Euphorbia cylindrifolia (incl. ssp. tuberifer) | | CITES |
| Euphorbia decaryi (incl all var.) | | CITES |
| Euphorbia francoisii | | CITES |
| Euphorbia haeleeleana | Akoko | ESA |
| Euphorbia moratii (incl: v. antsingiensis, bemarahensis, multiflora) | | CITES |
| Euphorbia parvicyathophora | | CITES |
| Euphorbia quartziticola | | CITES |
| Euphorbia telephioides | | ESA-T |
| Euphorbia terracina | | NW |
| Euphorbia tulearensis | | CITES |
| Euphrasia spp. | | NW |
| Eutrema penlandii | | ESA-T |
| Euxylophora spp | | Rut. |
| Excobaria robbinsiorum | | ESA-T |
| Exocarpos luteolus | | ESA |
| Exocarpos spp. | | NW |
| Exorhopala spp. | | NW |
| Fagara spp. | | Rut. |
| Fagaropsis spp. | | Rut. |
| Fagopyrum esculentum | Buckwheat | FSA-A |
| Fargesia (= Thamnocalamus) spp. | Bamboo | Poa. |
| Ferocactus (= Sclerocactus) glaucus | | CITES |
| Ferocactus (= Sclerocactus) mesae-verdae | | CITES |
| Ferocactus (= Sclerocactus) pubispinus | | CITES |
| Ferocactus (= Sclerocactus) tobuschii | | CITES |
| Ferocactus (= Sclerocactus) wrightiae | | CITES |
| Feronia spp. | | Rut. |
| Feroniella spp. | | Rut. |
| Ferrocalamus (= Indocalamus) spp. | Bamboo | Poa. |
| Festuca arundinacea | Tall fescue | FSA-A |
| Festuca filiformis | Hair fescue | FSA-A |
| Festuca ovina | Sheep fescue | FSA-A |
| Festuca pratensis | Meadow fescue | FSA-A |
| Festuca rubra ssp. commutata | | FSA-A |
| Festuca rubra ssp. rubra | Red fescue | FSA-A |
| Festuca trachyphylla | Hard fescue | FSA-A |
| Fitzroya cupressoides | | CITES |
| Flindersia spp. | | Rut. |
| Flueggea neowawraea | Mehamehame | ESA |
| Fortunella spp. | Kumquat | Rut. |
| Fouquieria fasciculata | | CITES |
| Fouquieria purpusii | | CITES |
| Frankenia johnstonii | | ESA |
| Fremontodendron decumbens | | ESA |
| Fremontodendron mexicanum | | ESA |
| Fritillaria gentneri | Fritillary | ESA |
| Gahnia lanaiensis | | ESA |
| Gaiadendron spp. | Leechbush | NW |
| Galactia smallii | Milkpea | ESA |
| Galega officinalis | | NW |
| Galega officinalis | | NW |
| Galipea spp. | | Rut. |
| Galium buxifolium | Island bedstraw | ESA |
| Galium californicum ssp. sierrae | | ESA |
| Gardenia brighamii | | ESA |
| Gardenia mannii | | ESA |
| Gauligongshania spp. | Bamboo | Poa. |
| Gaura neomexicana ssp. coloradensis | | ESA-T |
| Geijera spp. | | Rut. |
| Geleznowia spp. | | Rut. |
| Gelidocalamus (= Indocalamus) spp. | | Poa. |
| Geocarpon minimum | | ESA-T |
| Geocaulon spp. | | NW |
| Geranium arboreum | | ESA |
| Geranium multiflorum | | ESA |
| Gerardia (= Agalinus) spp. | | NW |
| Gerardiina spp. | | NW |
| Gesneria pauciflora | | ESA-T |
| Geum radiatum | Spreading avens | ESA |
| Ghikaea spp. | | NW |
| Gigantochloa spp. | Bamboo | Poa. |
| Gilia tenuiflora ssp. arenaria | | ESA |
| Gilia tenuiflora ssp. hoffmannii | | ESA |
| Ginalloa spp. | | NW |
| Gjellerupia spp. | | NW |
| Glaziophyton spp. | | NW |
| Gleadovia spp. | | NW |
| Globimetula spp. | | NW |
| Glutago spp. | | NW |
| Glycine max | Soybean | FSA-A |
| Glycosmis spp. | | Rut. |
| Goetza elegans | | ESA |
| Gossypium spp. | Cotton | FSA-A |
| Gouania hillebrandii | | ESA |
| Gouania meyenii | | ESA |
| Gouania vitifolia | | ESA |
| Graderia spp. | | NW |
| Greslania spp. | Bamboo | Poa. |
| Grindelia fraxinipratensis | | ESA-T |
| Guadua spp. | Bamboo | Poa. |
| Guizotia abyssinica | Nigerseed | T |
| Gymnocactus (= Turbinicarpus) spp. | | CITES |
| Gymnoderma lineare | Rock gnome lichen | ESA |
| Hachettea spp. | | NW |
| Hackelia venusta | Showy stickseed | ESA |
| Halfordia spp. | | Rut. |
| Halophila johnsonii | | ESA-T |
| Haplostachys haplostachya | | ESA |
| Harmandia spp. | | NW |
| Harperocallis flava | | ESA |
| Harrisia fragrans | | ESA-T |
| Harrisia portoricensis | | ESA-T |
| Harrisonia spp. | | Rut. |
| Harveya spp. | | NW |
| Hedbergia spp. | | NW |
| Hedeoma todsenii | Pennyroyal | ESA |
| Hedyotis schlechtendahliana v. remyi (= Kadua cordata ssp. remyi) | | ESA |
| Hedysarum boreale | Sweetvetch | FSA-A |
| Helenium virginicum | | ESA-T |
| Helianthemum greenei | | ESA-T |
| Helianthus annuus | Sunflower | FSA-A |
| Helianthus eggertii | Sunflower | ESA-T |
| Helianthus paradoxus | | ESA-T |
| Helianthus schweinitzii | | ESA |
| Helicanthes spp. | | NW |
| Helietta spp. | | Rut. |
| Helixanthera spp. | | NW |
| Helonias bullata | Swamp pink | ESA-T |
| Helosis spp. | | NW |
| Hemizonia increscens ssp. villosa | Tarplant | ESA |
| Heracleum mantegazzianum | Hogweed | NW |
| Hesperethusa spp. | | Rut. |
| Hesperidanthus argillaceus | | ESA-T |
| Hesperidanthus barnebyi | | ESA |
| Hesperolinon congestum | Dwarf-flax | ESA-T |
| Hesperomannia arborescens | | ESA |
| Hesperomannia arbuscula | | ESA |
| Hesperomannia lydgatei | | ESA |
| Heterotheca (= Pityopsis) ruthii | | ESA |
| Hexastylis naniflora | Heartleaf | ESA-T |
| Hibanobambusa spp. | Bamboo | Poa. |
| Hibiscadelphus distans | Hau kuahiwi | ESA |
| Hibiscadelphus giffardianus | | ESA |
| Hibiscadelphus hualalaiensis | | ESA |
| Hibiscadelphus woodii | | ESA |
| Hibiscus arnottianus ssp. immaculatus | | ESA |
| Hibiscus brackenridgei | | ESA |
| Hibiscus cannabinus | Kenaf | FSA-A |
| Hibiscus clayi | | ESA |
| Hibiscus spp. | Rose mallow | T |
| Hibiscus waimeae ssp. hannerae | | ESA |
| Hickelia spp. | Bamboo | Poa. |
| Hilaria jamesii | Galletagrass | FSA-A |
| Himalayacalamus (= Thamnocalamus) spp. | Bamboo | Poa. |
| Hitchcockella spp. | Bamboo | Poa. |
| Hoffmannseggia tenella | Rush-pea | ESA |
| Holcus lanatus | Velvet grass | FSA-A |
| Holocarpha macradenia | Tarplant | ESA-T |
| Holttumochloa | Bamboo | Poa. |
| Homeria spp. see Moraea spp. | | |
| Hordeum vulgare | Barley | FSA-A |
| Hortia spp. | | Rut. |
| Houstonia purpurea v. montana | Bluet | ESA |
| Houzeaubambus (= Dendrocalamus) spp. | Bamboo | Poa. |
| Howellia aquatilis | | ESA-T |
| Hudsonia ericoides ssp. montana | | ESA-T |
| Humblotiodendron spp. | | Rut. |
| Huperzia (= Lycopodium) nutans | Wawae'iole | ESA |
| Hydnora spp. | | NW |
| Hydrilla verticillata | Hydrilla | NW |
| Hygrophila polysperma | Miramar weed | NW |
| Hylomyza spp. | | NW |
| Hymenoxys texana | Texas dawn-flower | ESA |
| Hyobanche spp. | | NW |
| Hypericum cumulicola | | ESA |
| Hypopitys spp. | | NW |
| Ileostylus spp. | | Parasitic |
| Ilex cookii | | ESA |
| Ilex sintenisii | | ESA |
| Iliamna corei | Mallow | ESA |
| Imperata brasiliensis | Brazillian satintail | NW |
| Imperata cylindrica | Cogongrass | NW |
| Indigofera hirsuta | Hairy indigo | FSA-A |
| Indocalamus spp. | Cane | Poa. |
| Indosasa spp. | | Poa. |
| Inula britannica | Elecampane | NW |
| Iodina spp. | | NW |
| Ipomoea aquatica | Swamp morning glory | NW |
| Ipomopsis sancti-spiritus | | ESA |
| Iris lacustris | Lake iris | ESA-T |
| Ischaemum byrone | | ESA |
| Ischaemum rugosum | Murain grass | NW |
| Isodendrion hosakae | Aupaka | ESA |
| Isodendrion laurifolium | | ESA |
| Isodendrion pyrifolium | | ESA |
| Isoetes louisianensis | LA quillwort | ESA |
| Isoetes malanospora | Black-spored quillwort | ESA |
| Isoetes tegetiformans | Mat-forming quillwort | ESA |
| Isotria medeoloides | Pogonia | ESA-T |
| Ivesia kingii v. eremica | | ESA-T |
| Ixocactus spp. | | NW |
| Jacquemontia reclinata | | ESA |
| Jodina, see Iodina | | |
| Juelia spp. | | NW |
| Juglans jamaicensis | West Indian walnut | ESA |
| Justicia cooleyi | Water willow | ESA |
| Kadenicarpus (= Turbinicarpus) spp. | | CITES |
| Kadua cordata (= Hedyotis schlechtendahliana) ssp. remii | | ESA |
| Kadua laxiflora | | ESA |
| Kadua parvula | | ESA |
| Kadua st.-johnii | | ESA |
| Kanaloa kahoolawensis | | ESA |
| Kinabaluchloa spp. | Bamboo | Poa. |
| Klemachloa (= Dendrocalamus) spp. | | Poa. |
| Knautia arvensis | Blue buttons | NARGS |
| Kochia prostrata | | FSA-A |
| Kokia cookei | Koki'o | ESA |
| Kokia drynarioides | | ESA |
| Kokia kauaiensis | | ESA |
| Kopsiopsis spp. | | NW |
| Korthalsella spp. | | NW |
| Krameria spp. | | NW |
| Kummerowia stipulacea | Korean lespedeza | FSA-A |
| Kummerowia striata | Japanese bush clover | FSA-A |
| Kunkiella spp. | | NW |
| Labordia cyrtandrae | Kamakahala | ESA |
| Labordia lydgatei | | ESA |
| Labordia tinifolia v. lanaiensis | | ESA |
| Labordia tinifolia v. wahiawaensis | | ESA |
| Labordia triflora | | ESA |
| Lactuca sativa | Lettuce | FSA-V |
| Laelia jongheana | | CITES |
| Laelia lobata | | CITES |
| Lagarosiphon major | Oxygen weed | NW |
| Lampas spp. | | NW |
| Langsdorffia spp. | | NW |
| Lasthenia burkei | Goldfields | ESA |
| Lasthenia conjugens | | ESA |
| Lathraea spp. | | NW |
| Lathrophytum spp. | | NW |
| Lathyrus hirsutus | Rough pea | FSA-A |
| Lathyrus spp. | Sweet pea | T |
| Layia carnosa | | ESA |
| Lebetanthus spp. | | NW |
| Leiphaimos spp. | | NW |
| Leleba (= Bambusa) spp. | Bamboo | Poa. |
| Lembertia (= Monolopia) congdonii | | ESA |
| Lennoa spp. | | NW |
| Lens culinaris | | FSA-A |
| Lens spp. | | T |
| Lepanthes eltoroensis | | ESA |
| Lepeostegeres spp. | | NW |
| Lepidaploa proctorii | | ESA |
| Lepidaria spp. | | NW |
| Lepidium arbuscula | Anaunau | ESA |
| Lepidium barnebyanum | Ridge-cress | ESA |
| Lepidoceras spp. | | NW |
| Lepionurus spp. | | NW |
| Leptocanna (= Schizostachyum) spp. | Bamboo | Poa. |
| Leptocereus grantianus | | ESA |
| Leptochloa spp. | Bamboo | NW |
| Leptomeria spp. | Currant-bush | NW |
| Leptorhabdos spp. | | NW |
| Leptothyrsa spp. | | Rut. |
| Lespedeza cuneata | Sericea | FSA-A |
| Lespedeza juncea | | FSA-A |
| Lesquerella filiformis | Bladderpod | ESA-T |
| Lesquerella kingii ssp. bernardina | | ESA |
| Lesquerella lyrata | | ESA-T |
| Lesquerella pallida | | ESA |
| Lesquerella perforata | | ESA |
| Lesquerella rubicundula | | ESA |
| Lesquerella thamnophila | | ESA |
| Lesquereuxia (= Siphonostegia) spp. | | NW |
| Lessingia germanorum | | ESA |
| Leucosalpa spp. | | NW |
| Leymus cinereus | Basin wildrye | FSA-A |
| Liatris ohlingerae | | ESA |
| Ligaria spp. | | NW |
| Lilaeopsis schaffneriana v. recurva | Water-umbel | ESA |
| Lilium occidentale | Western lily | ESA |
| Lilium pardalinum ssp. pitkinense | | ESA |
| Limnanthes floccosa grandiflora | | ESA |
| Limnanthes floccosa ssp. californica | | ESA |
| Limnanthes vinculans | | ESA |
| Limnocitrus spp. | | Rut. |
| Limnophila sessiliflora | Ambulia | NW |
| Limonia spp. | | Rut. |
| Lindera melissifolia | Pondberry | ESA |
| Lingnania (= Bambusa) spp. | Bamboo | Poa. |
| Linum usitatissimum | Flax | FSA-A |
| Lipochaeta (= Melanthera) waimeaensis | | ESA |
| Lipochaeta fauriei | Nehe | ESA |
| Lipochaeta kamoiensis | | ESA |
| Lipochaeta lobata v. leptophylla | | ESA |
| Lipochaeta micrantha | | ESA |
| Lipochaeta tenuifolia | | ESA |
| Lipochaeta venosa | | ESA |
| Lithophragma maximum | Woodland star | ESA |
| Lobelia gaudichaudii ssp. koolauensis | | ESA |
| Lobelia monostachya | | ESA |
| Lobelia niihauensis | | ESA |
| Lobelia oahuensis | | ESA |
| Lolium multiflorum | Annual ryegrass | FSA-A |
| Lolium perenne | Perennial ryegrass | FSA-A |
| Lolium rigidum | | FSA-A |
| Lolium x hybridum | Inermediate ryegrass | FSA-A |
| Lomatium bradshawii | Desert-parsley | ESA |
| Lomatium cookii | | ESA |
| Lophophora williamsii | Mescal | CBP-controlled |
| Lophophytum spp. | | NW |
| Loranthus spp. | | NW |
| Lotus corniculatus | Birdsfoot trefoil | FSA-A |
| Lotus dendroideus (= scoparius) ssp. traskiae | | ESA |
| Lotus uliginosus | Big trefoil | FSA-A |
| Loxanthera spp. | | NW |
| Lubaria spp. | | Rut. |
| Lunasia spp. | | Rut. |
| Lupinus albus | White lupine | FSA-A |
| Lupinus angustifolius | Blue lupine | FSA-A |
| Lupinus luteus | | FSA-A |
| Lupinus nipomensis | | ESA |
| Lupinus oreganus (= sulphureus) v. kincaidii | | ESA-T |
| Lupinus tidestromii | | ESA |
| Lupinus westianus v. aridorum | | ESA |
| Luvunga spp. | | Rut. |
| Lycium ferocissimum | African boxthorn | NW |
| Lycopersicum esculentum | Tomato | FSA-A |
| Lycopodium (see Huperzia) nutans | | |
| Lygodium flexuosum | Maidenhair creeper | FO |
| Lygodium microphyllum | Old World climbing fern | FO |
| Lyonia truncata v. proctorii | | ESA |
| Lysiana spp. | | NW |
| Lysimachia asperulaefolia | Loosestrife | ESA |
| Lysimachia filifolia | | ESA |
| Lysimachia lydgatei | | ESA |
| Lysimachia maxima | | ESA |
| Lysimachia ternifolia (= maxima) | | ESA |
| Macbridea alba | | ESA-T |
| Maclurolyra spp. | Bamboo | Poa. |
| Macranthera spp. | Flameflower | NW |
| Macrosolen spp. | | NW |
| Macrostylis spp. | | Rut. |
| Magdalenaea spp. | | NW |
| Mahoberberis spp. | | Q37 |
| Mahonia spp. | Grape holly | Q37 |
| Malacothamnus clementinus | Bush-mallow | ESA |
| Malacothamnus fasciculatus v. nesioticus | | ESA |
| Malacothrix indecora | | ESA |
| Malacothrix squalida | | ESA |
| Malania spp. | | NW |
| Mammillaria pectinifera | | CITES |
| Mammillaria solisioides | | CITES |
| Mangifera spp. | Mango | Q37 |
| Manihot walkerae | Manioc | ESA |
| Mannagettaea spp. | | NW |
| Mariscus fauriei | | ESA |
| Mariscus pennatiformis | | ESA |
| Marshallia mohriee | Barbara button | ESA-T |
| Marsilea villosa | Ihi'ihi | ESA |
| Matudacalamus spp. | Bamboo | Poa. |
| Medicago arabica | Burclover | FSA-A |
| Medicago lupulina | Black medic | FSA-A |
| Medicago orbicularis | | FSA-A |
| Medicago polymorpha | | FSA-A |
| Medicago sativa ssp. sativa | Alfalfa | FSA-A |
| Medicago trunculata | Barrelclover | FSA-A |
| Medicosma spp. | | Rut. |
| Megastigma spp. | | Rut. |
| Melaleuca quinquinervia | Broadleaf paper bark tree | NW |
| Melampyrum spp. | | NW |
| Melanthera waimeaensis | | ESA |
| Melasma spp. | | NW |
| Melastoma malabathricum | | NW |
| Melentha spp. | | NW |
| Melicope ascendens | | ESA |
| Melicope balloui | | ESA |
| Melicope haupuensis | | ESA |
| Melicope knudsenii | | ESA |
| Melicope lydgatei | | ESA |
| Melicope mucronulata | | ESA |
| Melicope munroi | | ESA |
| Melicope ovalis | | ESA |
| Melicope pallida | | ESA |
| Melicope quadrangularis | | ESA |
| Melicope reflexa | | ESA |
| Melicope saint-johnii | | ESA |
| Melicope spp. | | Rut. |
| Melicope zahlbruckneri | | ESA |
| Melilotus albus | Sweetclover | FSA-A |
| Melilotus officinalis | | FSA-A |
| Melinus minutiflora | Molassesgrass | FSA-A |
| Melocactus conoideus | | CITES |
| Melocactus deinacanthus | | CITES |
| Melocactus glaucescens | | CITES |
| Melocactus paucispinus | | CITES |
| Melocalamus spp. | Bamboo | Poa. |
| Melocanna spp. | Bamboo | Poa. |
| Menstruocalamus spp. | Bamboo | Poa. |
| Mentzelia leucophylla | Blazingstar | ESA-T |
| Merope spp | | Rut. |
| Merostachys spp. | Bamboo | Poa. |
| Merrillia spp. | | Rut. |
| Metrodorea spp. | | Rut. |
| Mezoneuron (= Caesalpinia) kavaiense | | ESA |
| Micrargeriella spp. | | NW |
| Microcirus (= Microcitrus x Poncirus) spp. | | Rut. |
| Microcitronella spp. | | Rut. |
| Microcitrus spp. | | Rut. |
| Microcybe spp. | | Rut. |
| Microcycas calocoma | | CITES |
| Micromelum spp. | | Rut. |
| Mida spp. | | NW |
| Mikania cordata | Mile-a-minute | NW |
| Mikania micrantha | | NW |
| Mimosa diplotricha | | NW |
| Mimosa invisa | Giant sensitive plant | NW |
| Mimosa pigra | Catclaw mimosa | NW |
| Mimulus michiganensis | Monkeyflower | ESA |
| Minuartia cumberlandensis | Sandwort | ESA |
| Mirabilis macfarlanei | Four o'clock | ESA-T |
| Miscanthus spp. | | NW |
| Misodendron spp. | | NW |
| Mitracarpus maxwelliae | | ESA |
| Mitracarpus polycladus | | ESA |
| Mitrastemon spp. | | NW |
| Mitrocereus (= Pachycereus) militaris | | CITES |
| Monanthrocitrus spp | | Rut. |
| Monardella linioides ssp. viminea | | ESA |
| Monnieria spp. | | Rut. |
| Monochasma spp. | | NW |
| Monochoria hastata | | NW |
| Monochoria vaginalis | | NW |
| Monolopia (= Lembertia) congdonii | | ESA |
| Monotropa spp. | | NW |
| Monotropsis spp. | | NW |
| Moquiniella spp. | | NW |
| Moraea collina | | NW |
| Moraea flaccida | | NW |
| Moraea miniata | | NW |
| Moraea ochroleuca | | NW |
| Moraea pallida | | NW |
| Mucuna pruriens | Velvetbean | FSA-A |
| Muellerina spp. | | NW |
| Munroidendron racemosum | | ESA |
| Murraya spp. | | Rut. |
| Myoschilos spp. | | NW |
| Myrcia paganii | | ESA |
| Myriocladus spp. | Bamboo | Poa. |
| Myrsine juddii | Kolea | ESA |
| Myrsine linearifolia | | ESA-T |
| Myrtopsis spp. | | Rut. |
| Mystropetalon spp. | | NW |
| Myzodendron spp. | | NW |
| Myzorrhiza spp. | | NW |
| Nanodea spp. | Chickweed | NW |
| Nassella trichotoma | Serrated tussock | NW |
| Nassella viridula | | FSA-A |
| Nasturtium gambellii | | ESA |
| Nasturtium officinale | Watercress | FSA-V |
| Nastus spp. | Bamboo | Poa. |
| Naudinia spp. | | Rut. |
| Navajoa (= Pediacactus) fickelsenii | | CITES |
| Navajoa (= Pediocactus) peeblesiana | | CITES |
| Navarretia fossalis | | ESA-T |
| Navarretia leucocephala ssp. pauciflora (= N. pauciflora) | | ESA |
| Navarretia leucocephala ssp. plieantha | | ESA |
| Necranthus spp. | | NW |
| Nematolepis spp. | | Rut. |
| Neobambus (= Sinobambus) spp. | | Poa. |
| Neogomesia (= Ariocarpus, Rosecactus) spp. | | CITES |
| Neohouzeaua (= Schizostachyum) spp. | Bamboo | Poa. |
| Neolloydia (= Sclerocactus) erectocentrus | | CITES |
| Neolloydia (= Sclerocactus) mariposensis | | CITES |
| Neolloydia (= Turbinocarpus) spp. | | CITES |
| Neolloydia, Pediocactus, Pelecyphora, Strombocactus, Thelocactus, Toumeya) spp. | | CITES |
| Neosasamorpha (= Sasa) spp. | Bamboo | Poa. |
| Neosinocalamus (= Dendrocalamus) spp. | Bamboo | Poa. |
| Neostapfia colusana | | ESA-T |
| Nepenthes khasiana | | CITES |
| Nepenthes rajah | | CITES |
| Neraudia angulata | | ESA |
| Neraudia ovata | | ESA |
| Neraudia sericea | | ESA |
| Nesogenes rotensis | | ESA |
| Nestronia spp. | | NW |
| Neurolepis spp. | Bamboo | Q37 |
| Nicotiana tabacum | Tobacco | FSA-A |
| Nitrophila mohavensis | | ESA |
| Noccaea fendleri spp. californica | | ESA |
| Nolina brittoniana | Beargrass | ESA |
| Nolina interrata | | CITES |
| Normanobokea (= Turbinocarpus) spp. | | CITES |
| Notanthera spp. | | NW |
| Nothocestrum breviflorum | Aiea | ESA |
| Nothocestrum peltatum | | ESA |
| Nothoscordum bivalve | False garlic | NARGS |
| Nothoscordum inodorum | False garlic | NARGS |
| Notothixos spp. | | NW |
| Nototrichium humile | Kulu'i | ESA |
| Nuytsia spp. | | NW |
| Obregonia denegrii | | CITES |
| Ochlandra spp. | Bamboo | Poa. |
| Ochrosia kilaueaensis | Holei | ESA |
| Odontites spp. | | NW |
| Oedina spp. | | NW |
| Oenothera californica ssp. eurekensis | | ESA |
| Oenothera deltoides ssp. howellii | | ESA |
| Okoubaka spp. | | NW |
| Olax spp. | | NW |
| Oligoneuron houghtonii | | ESA-T |
| Oligostachyum spp. | Bamboo | Poa. |
| Oliverella spp. | | NW |
| Olmeca spp. | Bamboo | Poa. |
| Olyra spp. | Bambu-fraco | Poa. |
| Ombrophytum spp. | | NW |
| Omelocalamus (= Arundinaria) spp. | | Poa. |
| Omphacomeria spp. | | NW |
| Omphalotrix spp. | | NW |
| Oncella spp. | | NW |
| Oncocalyx spp. | | NW |
| Ongokea spp. | | NW |
| Onobrychis vicifolia | Sainfoin | FSA-A |
| Onopardum acaulon | Thistle | NW |
| Onopardum illyricum | Thistle | NW |
| Ophiocephalus spp. | | NW |
| Opilia spp. | | NW |
| Opuntia aurantiaca | Jointed prickly pear | NW |
| Opuntia basilaris v. treleasei | | ESA |
| Opuntia treleasei | Bakersfield cactus | ESA |
| Orcuttia (= Tuctoria) mucronata | | ESA |
| Orcuttia californica | Orcutt grass | ESA |
| Orcuttia pilosa | | ESA |
| Orcuttia tenuis | | ESA-T |
| Orcuttia viscida | | ESA |
| Oreiostachys (= Nastus) spp. | Bamboo | Poa. |
| Oreobambus spp. | Bamboo | Poa. |
| Oreocalamus (= Chimonobambusa) spp. | Bamboo | Poa. |
| Oricia spp. | | Rut. |
| Oriciopsis spp. | | Rut. |
| Orixa spp. | | Rut. |
| Orobanche spp. (except bulbosa, californica, cooperi, corymbosa, dugesii, fasciculata, ludoviciana, multicaulis, parishii, pinorum, uniflora, valida, vallicola) | | NW |
| Orthantha spp. | | NW |
| Orthocarpus spp. | | NW |
| Oryctanthus spp. | | NW |
| Oryza longistaminata | Red rice | NW |
| Oryza punctata | Red rice | NW |
| Oryza rufipogon | Red rice | NW |
| Oryza spp. | | 319.55 |
| Oryzopsis hymenoides | Indian ricegrass | FSA-A |
| Osmoxylon mariannense | | ESA |
| Osyridicarpos spp. | | NW |
| Osyris spp. | | NW |
| Otatea spp. | Bamboo | Poa. |
| Ottelia alismoides | Duck-lettuce | NW |
| Ottoschulzia rhodoxylon | Palo de rosa | ESA |
| Oxypolis canbyi | Dropwort | ESA |
| Oxytenanthera spp. | Bamboo | Poa. |
| Oxytropis campestris v. chartacea | Locoweed | ESA-T |
| Pachycereus chrysomallus | | CITES |
| Pachycereus militaris (= chrysomallus) | | CITES |
| Pachypodium ambongense | | CITES |
| Pachypodium baronii | | CITES |
| Pachypodium decaryi | | CITES |
| Packera franciscana | Groundsel | ESA-T |
| Packera layneae | | ESA-T |
| Pagetia (= Bosistoa) spp. | | Rut. |
| Pamburus spp. | | Rut. |
| Panamanthus spp. | | NW |
| Panicum antidotale | Blue panicgrass | NW |
| Panicum fauriei v. carteri | Panicgrass | ESA |
| Panicum maximum v. maximum, trichoglume | | NW |
| Panicum millaceum | Proso millet | NW |
| Panicum nihauense | Lauiehu | ESA |
| Panicum spp. | | Poa. |
| Panicum virgatum | Switchgrass | FSA-A |
| Papaver somniferum | Opium poppy | CBP-controlled |
| Paphiopedilum spp. | | CITES |
| Papuanthes spp. | | NW |
| Paramignya spp. | | Rut. |
| Parasitaxis spp. | | NW |
| Parastriga spp. | | NW |
| Parentucellia spp. | | NW |
| Parodia (= Uebelmannia) gummifera | | CITES |
| Paronychia chartacea (= Nyachia pulvinata) | | ESA-T |
| Parvisedum leiocarpum | Stonewort | ESA |
| Pascopyrum smithii | Wheatgrass | FSA-A |
| Paspalum dilatatum | Dallisgrass | FSA-A |
| Paspalum notatum | Bahiagrass | FSA-A |
| Paspalum scrobiculatum | Kodomillet | NW |
| Paspalum urvillei | Vaseygrass | FSA-A |
| Pastinaca sativa | Parsnip | FSA-V |
| Pedicularis furbishiae | | ESA |
| Pedicularis spp. | Louseworts | ESA, NW |
| Pediocactus (= Sclerocactus) erectocentrus (=Echinomastus acunensis, krausei; Neolloydia erectocentrus) | | CITES |
| Pediocactus (= Sclerocactus) fickelsenii | | CITES |
| Pediocactus (= Sclerocactus) mesae-verdae | | CITES |
| Pediocactus (= Sclerocactus) papyracanthus | | CITES |
| Pediocactus (= Sclerocactus) simpsonii | | CITES |
| Pediocactus (= Sclerocactus) wrightiae | | CITES |
| Pediocactus (= Sclerocactus, Anistrocactus, Ferrocactus) brevihamatus ssp.tobuschii | | ESA, CITES |
| Pediocactus (= Toumeya, Navajoa, Utahia) peeblesianus | | CITES |
| Pediocactus (=Echinocactus, Utahia) sileri | | CITES |
| Pediocactus bradyi | Pincushion cactus | ESA, CITES |
| Pediocactus bradyi (= despainii, winkleri, simpsonii) | | CITES |
| Pediocactus despainii | | ESA |
| Pediocactus knowltonii | | ESA, CITES |
| Pediocactus knowltonii | | CITES, ESA |
| Pediocactus paradinei | | CITES |
| Pediocactus paradinei | | CITES |
| Pediocactus peeblesianus peeblesianus | | ESA, CITES |
| Pediocactus simpsonii | | ESA, CITES |
| Pediocactus winkleri | | ESA |
| Pedistylis spp. | | NW |
| Pelea spp. | | Rut. |
| Pelecyphora (= Encephalaocarpus) spp. | | CITES |
| Peltostigma spp. | | Rut. |
| Pennisetum clandestinum | Kikuyugrass | NW |
| Pennisetum glaucum | Pearl millet | FSA-A |
| Pennisetum macrourum | African feathergrass | NW |
| Pennisetum pedicillatum | Kyasumagrass | NW |
| Pennisetum purpureum | Napiergrass | FSA-A |
| Pennisetum spp. | | NW |
| Penstemon haydenii | | ESA |
| Penstemon penlandii | Beardtongue | ESA |
| Pentaceras spp. | | Rut. |
| Pentachaeta bellidiflora | | ESA |
| Pentachaeta lyonii | | ESA |
| Pentarhopalopilia spp. | | NW |
| Peperomia wheeleri | | ESA |
| Peraxilla spp. | | NW |
| Perella spp. | | NW |
| Peristeria elata | Dove flower | CITES |
| Perrierbambus spp. | Bamboo | Poa. |
| Persea spp. | Avocado | Q37 |
| Petalostemmon (= Dalea) foliosa | | ESA |
| Petroselinum crispum | Parsley | FSA-V |
| Peucedanum sandwicense | Mokou | ESA-T |
| Phacelia argillacea | | ESA |
| Phacelia formosula | | ESA |
| Phacelia insularis ssp. insularis | | ESA |
| Phacellanthus spp. | | NW |
| Phacellaria spp. | | NW |
| Phalaris aquatica | Hardinggrass | FSA=A |
| Phalaris arundinacea | Canarygrass | FSA-A |
| Phalaris canariensis | | FSA-A |
| Phanerodiscus spp. | | NW |
| Phaseolus coccineus | Runner bean | FSA-V |
| Phaseolus lunatus | Lima bean | FSA-V |
| Phaseolus vulgaris v. vulgaris | | FSA-V |
| Pheballium spp. | Satinwood | Rut. |
| Phellodendron spp. | | Rut. |
| Phelypaea spp. | | NW |
| Philotheca spp. | Waxflower | Rut. |
| Phlegmariurus (= Lycopodium, Huperzia) nutans | | ESA |
| Phleum nodosum | Timothy | FSA-A |
| Phleum pratense | | FSA-A |
| Phlox hirsuta | | ESA |
| Phlox nivalis ssp. texensis | | ESA |
| Pholisma spp. | Sand food | NW |
| Phoradendron spp. | Mistletoe | NW |
| Phragmanthera spp. | | NW |
| Phragmipedium spp. | | CITES |
| Phrygilanthus spp. | | NW |
| Phtheirospermum spp. | Song hao | NW |
| Phthirusa spp. | | NW |
| Phyllosma spp. | | Rut. |
| Phyllostachys spp. | Bamboo | Poa. |
| Phyllostegia glabra v. lanaiensis | | ESA |
| Phyllostegia hispida | | ESA |
| Phyllostegia kaalaensis | | ESA |
| Phyllostegia knudsenii | | ESA |
| Phyllostegia mannii | | ESA |
| Phyllostegia mollis | | ESA |
| Phyllostegia parviflora | | ESA |
| Phyllostegia racemosa | | ESA |
| Phyllostegia velutina | | ESA |
| Phyllostegia waimeae | | ESA |
| Phyllostegia warshaueri | | ESA |
| Phyllostegia wawrana | | ESA |
| Physalis pubescens and P. pubescens | Husk tomato | FSA-V |
| Physaria obcordata | Twinpod | ESA-T |
| Physocalyx spp. | | NW |
| Pilgerodendron uviferum | | CITES |
| Pilocarpus spp. | | Rut. |
| Pilosocereus (= Cereus) robinii | | ESA |
| Pilostyles spp. | | NW |
| Pinguicula ionantha | Butterwort | ESA-T |
| Piptantherum miliaceum | Smilo grass | FSA-A |
| Piresia spp. | Bamboo | Poa. |
| Piresiella spp. | Bamboo | Poa. |
| Pisum sativum | Pea | FSA-A, FSA-V |
| Pitavia spp. | | Rut. |
| Pityopsis (= Heterotheca, Chryopsis) ruthii | | ESA |
| Plagiobothrys hirtus | Rough popcornflower | ESA |
| Plagiobothrys strictus | Allocarya | ESA |
| Plantago hawaiensis | Kuahiwi laukahi | ESA |
| Plantago princeps | | ESA |
| Platanthera holochila | | ESA |
| Platanthera leucophaea | Fringed orchid | ESA-T |
| Platanthera praeclara | | ESA-T |
| Platanthera yadonii | Piperia | ESA |
| Platanus spp. | | FO |
| Platydesma spp. | | Rut. |
| Platypholis spp. | | NW |
| Pleioblastus (= Arundinaria) spp. | Bamboo | Poa. |
| Pleiococca spp. | Hard aspen | Rut. |
| Pleiospermium spp. | Orangeasters | Rut. |
| Pleodendron macranthum | Chupacallos | ESA |
| Plethadenia spp. | | Rut. |
| Pleurandropsis (= Asterolasia) spp. | | Rut. |
| Pleuraphis jamesii | Galletagrass | FSA-A |
| Plicosepalus spp. | | NW |
| Poa annua | | FSA-A |
| Poa arachnifer | | FSA-A |
| Poa atropurpuea | Bluegrass | ESA |
| Poa bulbosa | | FSA-A |
| Poa compressa | | FSA-A |
| Poa glauca | | FSA-A |
| Poa mannii | | ESA |
| Poa napensis | | ESA |
| Poa nemoralis | | FSA-A |
| Poa pratensis | | FSA-A |
| Poa sandvicensis | | ESA |
| Poa secunda | | FSA-A |
| Poa siphonoglossa | | ESA |
| Poa trivialis | Bluegrass | FSA-A |
| Podocarpus parlatorei | | CITES |
| Pogogyne abramsii | Mesa-mint | ESA |
| Pogogyne nudiuscula | | ESA |
| Polyaster spp. | | Rut. |
| Polygala lewtonii | | ESA |
| Polygala smallii | | ESA |
| Polygonella basiramia | Wireweed | ESA |
| Polygonella myriophylla | Sandlace | ESA |
| Polygonum hickmanii | | ESA |
| Polystichum aleuticum | | ESA |
| Polystichum calderonense | | ESA |
| Polytoca spp. | Corn relative | Q37 |
| Poncirus spp. | | Rut. |
| Portulaca sclerocarpa | Po'e | ESA |
| Potamogeton clystocarpus | Pondweed | ESA |
| Potentilla hickmanii | | ESA |
| Primula maguirei | | ESA-T |
| Pritchardia affinis | Lo'ulu | ESA |
| Pritchardia aylmer-robinsonii | | ESA |
| Pritchardia kaalae | | ESA |
| Pritchardia munroi | | ESA |
| Pritchardia napaliensis | | ESA |
| Pritchardia remota | | ESA |
| Pritchardia schattaueri | | ESA |
| Pritchardia viscosa | | ESA |
| Prosopanche spp. | | NW |
| Prosopis alapataco | Mesquites | NW |
| Prosopis argentina | | NW |
| Prosopis articulata | | NW |
| Prosopis burkartii | | NW |
| Prosopis caldenia | | NW |
| Prosopis calingastana | | NW |
| Prosopis campestris | | NW |
| Prosopis castellanosii | | NW |
| Prosopis denudans | | NW |
| Prosopis elata | | NW |
| Prosopis farcta | | NW |
| Prosopis ferox | | NW |
| Prosopis fiebrigii | | NW |
| Prosopis hassleri | | NW |
| Prosopis humilis | | NW |
| Prosopis kuntzei | | NW |
| Prosopis pallida | | NW |
| Prosopis palmeri | | NW |
| Prosopis reptans | | NW |
| Prosopis rojasiana | | NW |
| Prosopis ruizlealii | | NW |
| Prosopis ruscifolia | | NW |
| Prosopis sericantha | | NW |
| Prosopis strombulifera | | NW |
| Prosopis torquata | | NW |
| Prunus geniculata | Scrub plum | ESA |
| Prunus spp. other than avium, canescans, cerasus, effusa, mahaleb, padus, sargentii, serotina, serrrula, serrulata, subhirtella, virginia, yedoensis | Stone fruit | Q37 |
| Psathyranthus spp. | | NW |
| Psathyrostachys juncea | Wildrye | FSA-A |
| Pseudobahia bahiifolia | Golden sunburst | ESA |
| Pseudobahia peirsonii | | ESA |
| Pseudobambusa | Bamboo | Poa. |
| Pseudobartsia spp. | | NW |
| Pseudocoix spp. | Reed | Poa. |
| Pseudoroegneria spicata | Wheatgrass | FSA-A |
| Pseudosasa spp. | Bamboo | Poa. |
| Pseudosopubia spp. | | NW |
| Pseudostachyum spp. | Bamboo | Poa. |
| Pseudostriga spp. | | NW |
| Psilopeganum spp. | | Rut. |
| Psittacanthus spp. | | NW |
| Ptelea spp. | Wafer-ash | Rut. |
| Pteralyxia kauaiensis | Kaulu | ESA |
| Pteris lydgatei | | ESA |
| Pteroxylon spp. | Sneezewood | Rut. |
| Pterygiella (Monochasma) spp. | | NW |
| Ptilimnium nodosum (= fluviatile) | | ESA |
| Ptychopetalum spp. | | NW |
| Pueraria montana v. lobata | Kudzu | FSA-A |
| Purshia (= Cowania) subintegra | Cliff-rose | ESA |
| Pyrularia spp. | | NW |
| Qiongzhuea(Chimonobambusa) spp. | Bamboo | Poa. |
| Quercus spp. | Oak | T |
| Quinchamalium spp. | | NW |
| Racemobambos (= Neomicrocalamus) | Bamboo | Poa. |
| Radamaea spp. | | NW |
| Rafflesia spp. | | NW |
| Ranunculus aestivalis (= acriformis) | Autumn buttercup | ESA |
| Raphanus sativus | Radish | FSA-V |
| Raputia spp. | Hoptree | Rut. |
| Raula (= Angostura) spp. | | Rut. |
| Ravenia spp. | Limonia | Rut. |
| Remya kauaiensis | | ESA |
| Remya mauiensis | | ESA |
| Remya montgomeryi | | ESA |
| Renanthera imschootiana | | CITES |
| Rettbergia (Chusquea) spp. | Bamboo | Poa. |
| Rhamphicarpa spp. | | NW |
| Rhaphispermum spp. | | NW |
| Rheum rhabarbarum | Rhubarb | FSA-V |
| Rhinanthus spp. | | NW |
| Rhipidocladum spp. | Bamboo | Poa. |
| Rhizanthes spp. | | NW |
| Rhizomonanthes spp. | | NW |
| Rhodiola rosea | Roseroot | ESA-T |
| Rhododendron minus v. chapmanii | | ESA |
| Rhododendron spp. | | FO |
| Rhoiacarpos spp. | | NW |
| Rhopalocnemis spp. | | NW |
| Rhopalopilia spp. | | NW |
| Rhus michauxii | Sumac | ESA |
| Rhynchochorys spp. | | NW |
| Rhynchospora knieskernii | Beaked-rush | ESA-T |
| Ribes echinellum | Gooseberry | ESA-T |
| Ribes spp. | Currant, gooseberry | Q37 |
| Ricinus communis | Castorbean | FSA-A |
| Rollandia (= Cyanea) crispa | | ESA |
| Rorippa gambellii | Watercress | ESA |
| Rorippa nasturtion-aquaticum | | ESA, FSA-V |
| Rottboellia exaltata (= cochinchinensis) | Itchgrass | NW |
| Rubus fruticosus | Wild blackberry | NW |
| Rubus moluccanus | Wild raspberry | NW |
| Rumex acetos | Sorrel, dock | FSA-V |
| Rutaceae family | Citrus | Rut. |
| S | | |
| Saccharum officinarum and hybrids | Sugarcane | FSA-A |
| Saccharum spontaneum | Wild sugarcane | NW |
| Sagittaria fasciculata | Bunched arrowhead | ESA |
| Sagittaria sagittifolia | Arrowhead | NW |
| Sagittaria secundifolia | Water-plantain | ESA-T |
| Salsola vermiculata | Wormleaf salsola | NW |
| Salvia officinalis | Sage | FSA-V |
| Salvia verbenaca | Vervain | NARGS |
| Salvinia auriculata | Giant salvinia | NW |
| Salvinia biloba | Giant salvinia | NW |
| Salvinia herzogii | Giant salvinia | NW |
| Salvinia molesta | Giant salvinia | NW |
| Sanguisorba minor | Burnet | FSA-A |
| Sanicula mariversa | | ESA |
| Sanicula purpurea | | ESA |
| Santalaceae | | NW |
| Santalum freycinetianum v. lanaiense (= v. eiliahi) | | ESA |
| Santalum spp. | Sandalwood | NW |
| Sapria spp. | | NW |
| Sarcodes spp. | | NW |
| Sarcomelicope spp. | Bauerella | Rut. |
| Sarcophyte spp. | | NW |
| Sargentia spp. | Chapote | Rut. |
| Sarracenia alabamensis (= rubra ssp.) alabamensis | | CITES |
| Sarracenia jonesii (= rubra ssp. jonesii) | | ESA, CITES |
| Sarracenia oreophila | Pitcher plant | ESA, CITES |
| Sasa spp. | Bamboo | Poa. |
| Sasaella (= Sasa x Arundinaria) spp. | Bamboo | Poa. |
| Sasamorpha (= Sasa) spp. | Bamboo | Poa. |
| Satureja hortensis | Summer savory | FSA-V |
| Saussurea costus (= lappa) | Costas | CITES |
| Scaevola coriacea | Naupaka, dwarf | ESA |
| Schenkia sebaeoides | Awiwi | ESA |
| Schiedea adamantis | | ESA |
| Schiedea apokremnos | | ESA |
| Schiedea haleakalensis | | ESA |
| Schiedea helleri | | ESA |
| Schiedea hookeri | | ESA |
| Schiedea kaalae | | ESA |
| Schiedea kauaiensis | | ESA |
| Schiedea kealiae | | ESA |
| Schiedea lychnoides | | ESA |
| Schiedea lydgatei | | ESA |
| Schiedea membranacea | | ESA |
| Schiedea nuttallii | | ESA |
| Schiedea obovata | | ESA |
| Schiedea sarmentosa | | ESA |
| Schiedea spergulina v. leiopoda, v. spergulina | | ESA |
| Schiedea stellarioides | Laulihilii | ESA |
| Schiedea trinervis | | ESA |
| Schiedea verticillata | | ESA |
| Schiedea viscosa | | ESA |
| Schizachyrium scoparium | Bluestem, little | FSA-A |
| Schizostachyum spp. | Bamboo | Poa. |
| Schlerachne spp. | | Q37 |
| Schoenocrambe (= Hesperidanthus) argillacea | | ESA |
| Schoenocrambe (= Hesperidanthus) barnebyi | Reed-mustard | ESA |
| Schoenocrambe (= Hesperidanthus) suffrutescens | | ESA |
| Schoepfia arenaria | | ESA-T |
| Schwalbea americana | Chaffseed | ESA |
| Schwalbea spp. | | NW |
| Scirpus ancistrochaetus | Bulrush | ESA |
| Sclerache (= Chionache) spp. | River grass | Poa. |
| Sclerocactus (= Coloradoa, Ferocactus, Pediocactus) mesae-verdae | | CITES |
| Sclerocactus (= Echinomastus, Neolloydia, Pediocactus) erectocentrus | | CITES |
| Sclerocactus (= Echinomastus, Neolloydia, Pediocactus) mariposensis | | CITES |
| Sclerocactus (= Ferocactus) glaucus (= brevispinus; wetlandicus spp. ilsea) | | CITES |
| Sclerocactus (= Ferocactus) nyensis | | CITES |
| Sclerocactus (= Ferocactus, Pediocactus) pubispinus | | CITES |
| Sclerocactus (= Pediocactus, Ferocactus) wrightii | | ESA, CITES |
| Sclerocactus (= Pediocactus, Toumeya) papyracanthus | | CITES |
| Sclerocactus (=Ancistrocactus, Ferocactus) brevihamatus ssp. tobuschii | Fishhook cactus | CITES, ESA |
| Sclerocactus brevihamatus ssp. tobuschii | | CITES |
| Sclerocactus brevispinus (= glaucus) | | CITES |
| Sclerocactus wetlandicus ssp. ilseae (= Sclerocactus glaucus) | | CITES |
| Scleropyrum spp. | Tatok | NW |
| Scurrula spp. | | NW |
| Scutellaria floridana | FL skullcap | ESA-T |
| Scutellaria montana | | ESA-T |
| Scybalium spp. | | NW |
| Seacale cereale | Rye | FSA-A |
| Secale strictum | Mountain rye | FSA-A |
| Securgera varia | Crown-vetch | FSA-A |
| Seeds of all kinds when in pulp | | Q37 |
| Semiarundinaria spp. | Bamboo | Poa. |
| Senecio inaequidens | Canary weed | NW |
| Senecio madagascariensis | Madagascar ragwort | NW |
| Septulina spp. | | NW |
| Serianthes nelsonii | | ESA |
| Sesamum indicum | Sesame | FSA-A |
| Sesbania exaltata | Sesbania | FSA-A |
| Sesbania tomentosa | Ohai | ESA |
| Setaria italica | Foxtail millet | 319, FSA-A |
| Setaria pallide-fusca | Cattail grass | 319 |
| Setaria spp. | | Q37 |
| Severinia spp. | | FO |
| Seymeria spp. | | NW |
| Shibataea spp. | Bamboo | Poa. |
| Sibara filifolia | Rockcress | ESA |
| Sicyos alba | Anunu | ESA |
| Sidalcea keckii | Checker-mallow | ESA |
| Sidalcea nelsoniana | | ESA |
| Sidalcea oregana ssp. valida | | ESA |
| Sidalcea oregana v. calve | | ESA |
| Sidalcea pedata | | ESA |
| Silene alexandri | | ESA |
| Silene catesbaei | Fringed campion | ESA |
| Silene Hawaiiensis | | ESA-T |
| Silene lanceolata | | ESA |
| Silene perlmanii | | ESA |
| Silene polypetala | Fringed campion | ESA |
| Silene spaldingii | Catchfly | ESA |
| Silviella spp. | | NW |
| Sinapis alba | White mustard | FSA-A |
| Sinarundinaria (= Fargesia) spp. | Bamboo | Poa. |
| Sinobambusa spp. | Bamboo | Poa. |
| Sinocalamus (= Dendrocalamus) spp. | Bamboo | Poa. |
| Siphonostegia spp. | | NW |
| Sisyrinchium dichotomum | Irisette | ESA |
| Skimmia spp. | | Rut. |
| Socratina spp. | | NW |
| Soejatmia spp. | Bamboo | Poa. |
| Sogerianthe spp. | | NW |
| Solanum drymophilum | Erubia | ESA |
| Solanum incompletum | | ESA |
| Solanum lycopersicum | Tomato | FSA-V |
| Solanum melongena | Eggplant | FSA-V |
| Solanum sandwicense | | ESA |
| Solanum spp., Section Tuberarium | Potato | Q37 |
| Solanum tampicense | Nightshade | NW |
| Solanum torvum | Turkeyberry | NW |
| Solanum tuberoses | Potato | Q37 |
| Solanum viarum | | NW |
| Solidago spithamea | | ESA-T |
| Solidity papillose | Goldenrod | ESA-T |
| Solidity shortie | | ESA |
| Solisia pectinata (= Mammillaria pectinifera) | | CITES |
| Sonchus arvensis | | NW |
| Sopubia spp. | | NW |
| Sorghastrum nutans | Yellow indiangrass | FSA-A |
| Sorghum bicolor | Broomcorn | 319, FSA-A |
| Sorghum halepense | | NW |
| Sorghum halpense | Johnson grass | FSA-A |
| Sorghum spp. and hybrids | | FSA-A |
| Sorghum x almum | | FSA-A |
| Sorghum x drummondii | Sudangrass | FSA-A |
| Sparganium erectum | Exotic bur-reed | NW |
| Spermacoce (= Borreria) alata | | NW |
| Spermolepis hawaiiensis | | ESA |
| Spigelia gentianoides | Pinkroot | ESA |
| Spinacia oleracea | Spinach | FSA-V |
| Spiraea virnginiana | | ESA-T |
| Spiranthera spp. | | Rut. |
| Spiranthes delitescens | | ESA |
| Spiranthes diluvialis | Ladies tresses | ESA-T |
| Spiranthes parksii | | ESA |
| Spirodardnera spp. | | NW |
| Spirostegia spp. | | NW |
| Sporobolus cryptandrus | Sand dropseed | FSA-A |
| Spragueanella spp. | | NW |
| Stahlia monosperma | Cobana negra | ESA-T |
| Stanfordia californica | Jewelflower | ESA |
| Stangeria eriopus (= paradoxa) | | CITES |
| Stauranthus spp. | Tankasché | Rut. |
| Stenogyne angustifolia v. angustifolia | | ESA |
| Stenogyne bifida | | ESA |
| Stenogyne campanulata | | ESA |
| Stenogyne kanehoana | | ESA |
| Stephanomeria malheurensis | Wire-lettuce | ESA |
| Stipa viridula | Green needlegrass | FSA-A |
| Stratiotes aloides | Water aloe | NW |
| Streptanthus albidus ssp. albidus | Jewelflower | ESA |
| Streptanthus niger | | ESA |
| Striga spp. | | NW |
| Strombocactus spp. | | CITES |
| Struthanthus spp. | | NW |
| Styrax platanifolius | TX snowbells | ESA |
| Styrax portoricensis | Palo de jazmin | ESA |
| Suaeda californica | Seablite | ESA |
| Swallenia alexandrae | Eureka dune grass | ESA |
| Swallenochloa (= Chusquea) spp. | Bamboo | Poa. |
| Swinglea spp. | | FO |
| T | | |
| Tapinanthus spp. | | NW |
| Taraxacum californicum | | ESA |
| Taraxacum officinale | Dandelion | FSA-V |
| Taxillus spp. | | NW |
| Teclea spp. | | Rut. |
| Tectaria estremerana | | ESA |
| Teinostachyum spp. | Bamboo | Poa. |
| Terminthodia spp. | | Rut. |
| Ternstroemia luquillensis | Palo colorado | ESA |
| Ternstroemia subsessilis | | ESA |
| Tetradium (= Evodium) spp. | | Rut. |
| Tetradyas spp. | | NW |
| Tetragonia tetragonioides | New Zealand squash | FSA-V |
| Tetragonocalamus (= Chimonobambusa) spp. | Bamboo | Poa. |
| Tetramolopium arenarium | | ESA |
| Tetramolopium cappillare | Pamakani | ESA |
| Tetramolopium filiforme | | ESA |
| Tetramolopium lepidotum ssp. lepidotum | | ESA |
| Tetramolopium remyi | | ESA |
| Tetramolopium rockii | | ESA |
| Tetraneuris herbacea | Lakeside daisy | ESA-T |
| Tetraplasandra gymnocarpa | Ohe'ohe | ESA |
| Tetraspidium spp. | | NW |
| Thalictrum cooleyi | Meadowrue | ESA |
| Thamnocalamus spp. | Bamboo | Poa. |
| Thamnosma spp. | Turpentine broom | Rut. |
| Thaumasianthes spp. | | NW |
| Thelocactus (= Turbinocarpus) spp. | | CITES |
| Thelypodium stenopetalum | Mustard | ESA-T |
| Thelypteris (= Leptogramma) pilosa v. alabamensis | | ESA-T |
| Thelypteris inabonensis | | ESA |
| Thelypteris verecunda | | ESA |
| Thelypteris yaucoensis | | ESA |
| Thesidium spp. | | NW |
| Thesium spp. | | NW |
| Thinopyrm intermedium ssp. intermedium | Wheatgrass | FSA-A |
| Thlaspi californicum | Pennycress | ESA |
| Thonningia spp. | | NW |
| Thunbergianthus spp. | | NW |
| Thymophylla tephroleuca | Dogweed | ESA |
| Thyrsostachys spp. | Bamboo | Poa. |
| Thysanocarpus conchulifer | Fringepod | ESA |
| Ticorea spp. | | Rut. |
| Toddalia spp. | | Rut. |
| Toddaliopsis spp. | Wild mandarin | Rut. |
| Tolypanthes spp. | | NW |
| Torreya taxifolia | | ESA |
| Toumeya (= Pediocactus) bradyi | | CITES |
| Toumeya (= Pediocactus) peeblesiana | | CITES |
| Toumeya (= Sclerocactus) papyracanthus | | CITES |
| Toumeya (= Turbinocarpus) spp. | | CITES |
| Townsendia aprica | | ESA-T |
| Toxicosiphon spp. | | Rut. |
| Tozzia spp. | | NW |
| Tragopogon porrifolius | | FSA-V |
| Tragopogon spp. | Goatsbeard | NARGS |
| Trematolobelia singularis | | ESA |
| Trichilia triacantha | Bariaco | ESA |
| Trichostemma austromontanum ssp. compactum | Bluecurls | ESA-T |
| Trifolium alexandrinum | Berseem clover | ESA |
| Trifolium amoenum | Showy Indian clover | ESA |
| Trifolium arvense | Field clover | NARGS |
| Trifolium campestre | Hop clover | FSA-A |
| Trifolium dubium | Suckling clover | FSA-A |
| Trifolium fragiferum | Strawberry clover | FSA-A |
| Trifolium glomeratum | Cluster clover | FSA-A |
| Trifolium hirtum | Rose clover | FSA-A |
| Trifolium hybridum | Alside clover | FSA-A |
| Trifolium incarnatum | Crimson clover | FSA-A |
| Trifolium lappaceum | Lappaclover | FSA-A |
| Trifolium pratense | Red clover | FSA-A |
| Trifolium repens | Ladino clover | FSA-A |
| Trifolium resupinatum | Persian clover | FSA-A |
| Trifolium semipilosum | Kenya clover | FSA-A |
| Trifolium stoloniferum | Running buffalo clover | ESA |
| Trifolium subterraneaneum | Subterranean cloverFSA-A | FSA-A |
| Trifolium trichocalyx | Monterey clover | ESA |
| Trifolium vesiculosum | Arrowleaf clover | FSA-A |
| Trilepidea spp. | | NW |
| Trillium persistans | | ESA |
| Trillium reliquum | | ESA |
| Trilobachne spp. | | Q37 |
| Triphasia spp. | Limeberry | Rut. |
| Triphysaria spp. | Johnny-tuck | NW |
| Tripodanthus spp. | | NW |
| Tripsacum spp. | Gamma grass | Poa. |
| Tristerix spp. | | NW |
| Trithecanthera spp. | | NW |
| Triticosecale, Secale x Triticum | Triticale | Poa. |
| Triticum aestivum spp. | Common wheat | FSA-A |
| Triticum compactum spp. | Club wheat | FSA-A |
| Triticum dicoccon spp. | Emmer | FSA-A |
| Triticum polonicum spp. | Polish wheat | FSA-A |
| Triticum spelta spp. | Spelt | FSA-A |
| Triticum spp. | | Q37 |
| Triticum turgidum spp. | Poulard wheat | FSA-A |
| Triticum x Agrotriticum | | FSA-A |
| Triticum x Agrotriticum | | FSA-A |
| Tritordium, Hordium x Triticum | | Poa. |
| Tuctoria greenei | | ESA |
| Tuctoria mucronata | Solano grass | ESA |
| Tupeia spp. | Pirita, tupia | NW |
| Turbinocarpus (= Gymnocactus, Normanbokea, Kadenicarpus, Neolloydia, Pediocactus, Pelecyphora, Strombocactus, Thelocactus, Toumeya) spp. | Turbinicacti | CITES |
| U | | |
| Uebelmannia (= Parodia) spp. | | CITES |
| Ulmus spp. | | Q37 |
| Urera kaalae | Opuhe | ESA |
| Urobotrya spp. | | NW |
| Urochloa panicoides | Liverseed grass | NW |
| Urochloa ramosa | Millet | FSA-A |
| Utahia (= Pediocactus) peeblesiana | | CITES |
| Utahia (= Pediocactus) sileri | | CITES |
| V | | |
| Valerianella locusta | Cornsalad | FSA-V |
| Valiha spp. | Bamboo | Poa. |
| Vanwyckia spp. | | NW |
| Vellosiella spp. | | NW |
| Vepris spp. | | Rut. |
| Verbena californica | Red Hills vervain | ESA-T |
| Verbesina dissita | Crownbeard | ESA-T |
| Vicia articulata | Monantha vetch | FSA-A |
| Vicia benghalensis | Purple vetch | FSA-A |
| Vicia faba | | FSA-V |
| Vicia menziesii | Hawaiian vetch | ESA |
| Vicia pannonica | Monantha vetch | FSA-A |
| Vicia sativa ssp. | | FSA-A |
| Vicia spp. | | T |
| Vicia villosa | | FSA-A |
| Vicia villosa ssp. villosa | | FSA-A |
| Vigna angularis | Adzuki bean | FSA-A |
| Vigna o-wahuensis | | ESA |
| Vigna radiata | Mung bean | FSA-A |
| Vigna unguiculata ssp. | Asparagus bean | FSA-V |
| Viola chamissoniana ssp. chamissoniana | | ESA |
| Viola helenae | | ESA |
| Viola kauaensis v. wahiawaensis | | ESA |
| Viola lanaiensis | | ESA |
| Viola oahuensis | | ESA |
| Viscum spp. | Mistletoe | NW |
| W | | |
| Warea amplexifolia | | ESA |
| Warea carteri | Mustard | ESA |
| Wenzella spp. | | Rut. |
| Wikesia hobdyi | Dwarf iliau | ESA |
| Wilcoxia nerispina (= Echinocereus schmollii) | | CITES |
| Wilcoxii (=Echinocereus) schmollii | | CITES |
| X | | |
| x Citroncirus | | Rut. |
| Xanthoxylum spp. | Sichuan pepper | Rut. |
| xColeara (= Clymenia x Fortunella) | | Rut. |
| xFortucitrocirus spp. | | Rut. |
| Ximenia spp. | | NW |
| Xizangia spp. | | NW |
| Xylanche spp. | | NW |
| Xylocalyx spp. | | NW |
| Xylosma crenata | | ESA |
| Xyris tennesseensis | TN yellow-eyed grass | ESA |
| Y | | |
| Yermo xanthocephalus | Yellowhead | ESA-T |
| Yushania (Sinarundinaria) spp. | Bamboo | Poa. |
| Z | | |
| Zanthoxylum depetalum v. tomentosum | | ESA |
| Zanthoxylum hawaiiense | A'e | ESA |
| Zanthoxylum thomasianum | Prickly-ash | ESA |
| Zea mays | | FSA-V |
| Zeltnera namophila | Centaury | ESA-T |
| Zieria spp. | | Rut. |
| Zieridium spp. | | Rut. |
| Zizania spp. | Wild rice | Poa. |
| Ziziphus celata | | ESA |
| Zoysia japonica | Japanese lawngrass | FSA-A |
| Zoysia matrella | Manilagrass | FSA-A |