Seeds Prohibited Entry into the U.S. - C's.

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Botanical Name	Authority
Calamagrostis spp.	NAPPRA
Callicarpa ampla	ESA-E
Callirhoe scabriuscula	ESA-E
Calochortus tiburonensis	ESA-T
Calodendrum spp.	NAPPRA
Calyptranthes thomasiana	ESA-E
Calyptridium pulchellum	ESA-T
Calyptronoma rivalis	ESA-E
Calystegia stebbinsii	ESA-E
Campanula rapunculoides	NARGS
Campanula robinsiae	ESA-E
Campuloclinium macrocephalum	NAPPRA
Canavalia molokaiensis	ESA-E
Canavalia napaliensis	ESA-E
Canavalia pubescens	ESA-E
Cannabis sativa	FSA-A
Cansjera spp.	Parasitic
Capsicum spp.	FSA-V
Cardamine micranthera	ESA-E
Carex albida	ESA-E
Carex lutea	ESA-E
Carex specuicola	ESA-E
Carrichtera annua	NAPPRA
Carthamus oxyacantha	NW
Carthamus tinctoria	FSA-A
Casimiroa spp.	NAPPRA
Cassia (= Chamaecrista) mirabilis	ESA-E
Cassinia arcuata	NAPPRA
Cassytha spp.	Parasitic
Castanea spp.	NAPPRA
Castilleja spp. Castilleja ornata	Parasitic ESA-E
Catesbaea melanocarpa	ESA-E
Cathariostachys spp.	NAPPRA
Cathedra spp.	Parasitic
Cattleya spp.	CITES
Caulanthus californicus	ESA-E
Caulerpa taxifolia	NW
Ceanothus ferrisae	ESA-E
Ceanothus ophiochilus	ESA-T
Ceanothus roderickii	ESA-E
Cecarria spp.	Parasitic
Cedrelopsis spp.	NAPPRA
Cenchrus agrimonioides	ESA-E
Cenchrus spp.	NAPPRA
Centranthera spp.	Parasitic
Centaurea cyaneus	FSA-V
Centaurium namophilum	ESA-T
Cephalostachyum spp.	NAPPRA
Ceratozamia spp.	CITES
Cercocarpus traskiae	ESA-E
Cereus eric-horus var fragrans	ESA-E
Cervantesia spp.	Parasitic
Cestrum laevigatum	NAPPRA
Chamaecrista glandulosa v. mirabilis	ESA-E
Chamaecrista lineata var. keyensis	ESA-E
Chamaesyce deltoidea pinetorum	ESA-T
Chamaesyce deltoidea serpyllum	ESA-E
Chamaesyce deltoidea ssp. deltoidea	ESA-E
Chamaesyce garberi	ESA-T
Chamaesyce halemanui	ESA-T
Chamaesyce herbstii	ESA-T
Chamaesyce hooveri	ESA-T
Chamaesyce kuwaleana	ESA-T
Chamaesyce rockii	ESA-T
Chamaesyce skottsbergii v. kalaeloana	ESA-T
Champereia spp.	Parasitic
Charpenteria densiflora	ESA-E
Chaunochiton spp.	Parasitic
Chionachne spp.	NAPPRA
Chionanthus pygmaeus	ESA-E
Chlamydophytum spp.	Parasitic
Chloothamnus (see: Nastus) spp.	Poa.
Chloris gayana	FSA-A
Chlorogalum purpureum	ESA-T
Chloropyron maritimum ssp. maritimum	Parasitic
Chloropyron mole ssp. mole	Parasitic
Chloropyron palmatum	Parasitic
Chloroxylon spp.	NAPPRA
Choisya spp.	NAPPRA
Choretrum spp.	Parasitic
Chorilaena spp.	NAPPRA
Choristegeres spp.	NW
Chorizanthe howellii	ESA-E
Chorizanthe orcuttiana	ESA-E
Chorizanthe pungens v. hartwegiana	ESA-E
Chorizanthe pungens v. pungens	ESA-T
Chorizanthe robusta v. hartwegii	ESA-E
Chorizanthe robusta v. robusta	ESA-E
Chorizanthe valida	ESA-E
Christisonia spp.	Parasitic
Chromolena frustrata	ESA-E
Chryopsis (= Pityopsis) ruthii	ESA-E
Chrysalidocarpus (see: Dypsis) decipiens	CITES
Chrysanthemum parthenium	NARGS
Chrysopogon aciculatus	NW
Chrysopsis (= Pityopsis = Heterotheca) ruthii	ESA-E
Chusquea spp.	NAPPRA
Cicer spp.	NAPPRA
Cichorium endivia	FSA-V
Cichorium intybus	FSA-V
Cineraria lyratiformis	NAPPRA
Cirsium fontinale v. fontinale	ESA-E
Cirsium fontinale v. obispoense	ESA-E
Cirsium hydrophilum v. hydrophilum	ESA-E
Cirsium loncholepis	ESA-E
Cirsium pitcheri	ESA-T
Cirsium scariosum v. citrinum	ESA-T
Cirsium pitcheri	ESA-T
Cirsium vinaceum	ESA-T
Cirsium wrightii	ESA-T
Cistanche deserticola	Parasitic
Cistanche spp.	Parasitic
x Citremocitrus (= Eremocitrus x Citrus) spp.	NAPPRA
Citrofortunella spp.	NAPPRA
Citromicrocitrus spp.	NAPPRA
x Citroncirus (= Citrus x Poncirus) spp.	NAPPRA
Citropsis spp.	NAPPRA
Citrullus amarus	FSA-V
Citrullus lanatus var. citroides (incl. v. lanatus)	FSA-V
Citrus spp.	NAPPRA
Cladocolea spp.	Parasitic
Cladomyza spp.	NW
Cladonia perforata	ESA-E
Clarkia franciscana	ESA-E
Clarkia imbricata	ESA-E
Clarkia speciosa ssp. immaculata	ESA-E
Clarkia springvillensis	ESA-T
Clausena spp.	NAPPRA
Clausenopsis (= Fagaropsis) spp.	NAPPRA
Clavinodum (= Arundinaria) spp.	NAPPRA
Clematis morefieldii	ESA-E
Clematis socialis	ESA-E
Clermontia drepanomorpha	ESA-E
Clermontia lindseyana	ESA-E
Clermontia oblongifolia ssp. brevipes	ESA-E
Clermontia oblongifolia ssp. mauiensis	ESA-E
Clermontia peleana	ESA-E
Clermontia pyrularia	ESA-E
Clermontia samuelii	ESA-E
Clevelandia spp.	Parasitic
Clitoria spp.	NAPPRA
Clitoria fragrans	ESA-T
Clymenia spp.	NAPPRA
Cneoridium spp.	NAPPRA
Cneorum spp.	NAPPRA
Cocos nucifera	NAPPRA
Coffea spp.	NAPPRA
Coix spp.	NAPPRA
Colanthelia spp.	NAPPRA
xColeara (= Clymenia x Fortunella) spp.	NAPPRA
Coleonema spp.	NAPPRA
Coloradoa (= Sclerocactus, Ferrocactus, Pediocactus) mesae-verdae	CITES
Colpoon spp.	Parasitic
Colubrina oppositifolia	ESA-E
Comandra spp.	Parasitic
Commelina benghalensis	NW
Comptonella spp.	NAPPRA
Conchocarpus spp.	NAPPRA
Condylostylis spp.	NAPPRA
Conopholis spp.	Parasitic
Conophytum spp.	CITES
Conradina brevifolia	ESA-E
Conradina etonia	ESA-E
Conradina glabra	ESA-E
Conradina verticillata	ESA-T
Convolvulus arvensis	NARGS
Cordia bellonis	ESA-E
Cordia curassavica	NAPPRA
Cordylanthus spp.	Parasitic
Cordylanthus mollis ssp. mollis	ESA-E
Cordylanthus palmatus	ESA-E
Cordylanthus spp.	Parasitic
Cordylanthus tenuis ssp. capillaris	ESA-E
Cornutia obovata	ESA-E
Coronilla spp.	NAPPRA
Correa spp.	NAPPRA
Corynea spp.	Parasitic
Coryphantha (= Escobaria) minima	ESA-T
Coryphantha ramillosa	ESA-T
Coryphantha (= Escobaria) robbinsorum	ESA-T
Coryphantha scheeri v. robustispina	ESA-E
Coryphantha (= Escobaria) sneedii var. leei (incl. var. sneedii)	CITES
Coryphantha werdermannii (densispina)	CITES
Coula spp.	Parasitic
Cowania (= Purshia) subintegra	ESA-E
Crambe hispanica ssp. abyssinica	FSA-A
Cranichis ricartii	ESA-E
Crassothonna clavifolia	CITES
Crassula helmsii	NAPPRA
Crataegus x sinaica	NAPPRA
Crescentia portoricensis	ESA-E
Criciuma spp.	NAPPRA
Crocanthemum greenei	ESA-T
Crossosperma spp.	NAPPRA
Crotalaria avonensis	ESA-E
Crotalaria brevidens v. intermedia	FSA-A
Crotalaria juncea	FSA-A
Crotalaria lanceolata	FSA-A
Crotalaria pallida	FSA-A
Crotalaria spectabilis	FSA-A
Crowea spp.	NAPPRA
Crupina vulgaris	NWs
Cryptantha crassipes	ESA-E
Ctenitis squamigera	ESA-E
Cucumis anguria	FSA-V
Cucumis melo	FSA-V
Cucumis sativus v. sativus	FSA-V
Cucurbita okeechobeensis v. okeechobeensis	ESA-E
Cucurbita maxima	FSA-V
Cucurbita moschata	FSA-V
Cucurbita pepo	FSA-V
Cupressus abramsiana	ESA-T
Cupressus goveniana ssp. goveniana	ESA-T
Curupira spp.	Parasitic
Cuscuta spp. (except US natives)	Parasitic
Cuscutaceae	NW
Cyamopsis tetragonoloba	FSA-A
Cyanea (= Rollandia) crispa	ESA-E
Cyanea acuminata	ESA-E
Cyanea asarifolia	ESA-E
Cyanea asplenifolia	ESA-E
Cyanea calycina	ESA-E
Cyanea copelandii ssp. copelandii	ESA-E
Cyanea copelandii ssp. haleakalaensis	ESA-E
Cyanea crispa	ESA-E
Cyanea dolichopoda	ESA-E
Cyanea dunbariae	ESA-E
Cyanea duvalliorum	ESA-E
Cyanea eleeleensis	ESA-E
Cyanea gibbsonii	ESA-E
Cyanea glabra	ESA-E
Cyanea grimesiana ssp. grimesiana	ESA-E
Cyanea grimesiana ssp. obatae	ESA-E
Cyanea hamatiflora ssp. carlsonii	ESA-E
Cyanea hamatiflora ssp. hamatiflora	ESA-E
Cyanea horrida	ESA-E
Cyanea humboldtiana	ESA-E
Cyanea kauaulaensis	ESA-E
Cyanea kolekoleensis	ESA-E
Cyanea koolauensis	ESA-E
Cyanea kuhihewa	ESA-E
Cyanea kunthiana	ESA-E
Cyanea lanceaolata	ESA-E
Cyanea lobata	ESA-E
Cyanea longiflora	ESA-E
Cyanea macrostegia ssp. gibsonii	ESA-E
Cyanea magnicalyx	ESA-T
Cyanea mannii	ESA-E
Cynea maritae	ESA-E
Cyanea marksii	ESA-E
Cyanea mauiensis	ESA-E
Cyanea mceldowneyi	ESA-E
Cyanea munroi	ESA-E
Cyanea obtusa	ESA-E
Cyanea pinnatifida	ESA-E
Cyanea platyphylla	ESA-E
Cyanea procera	ESA-E
Cyanea profuga	ESA-E
Cyanea purpurellifolia	ESA-E
Cyanea recta	ESA-T
Cyanea remyi	ESA-E
Cyanea rivularis	ESA-E
Cyanea shipmannii	ESA-E
Cyanea solanacea	ESA-E
Cyanea st-johnii	ESA-E
Cyanea stictophylla	ESA-E
Cyanea st-johnii	ESA-E
Cyanea superba	ESA-E
Cyanea tritomantha	ESA-E
Cyanea truncata	ESA-E
Cyanea undulata	ESA-E
Cyanotis axillaris	NAPPRA
Cyathea dryopteroides	ESA-E
Cycas beddomei	CITES
Cycas micronesica	ESA-T
Cycladenia humulis var. jonesii	ESA-T
Cyclocheilon spp.	Parasitic
Cyclosorus boydiae	ESA-T
Cymbaria spp.	Parasitic
Cyne spp.	Parasitic
Cycniopsis spp.	Parasitic
Cycnium spp.	Parasitic
Cynara cardunculus	FSA-A
Cyne spp.	Parasitic
Cynodon dactylon var. aridus (incl var. dactylon)	FSA-A
Cynomorium spp.	Parasitic
Cynosurus cristata	FSA-A
Cyperus aromaticus	NAPPRA
Cyperus bracheilema	NAPPRA
Cyperus exaltatus	NAPPRA
Cyperus fauriei	ESA-E
Cyperus flavidus	NAPPRA
Cyperus neokunthianus	ESA-E
Cyperus pennatiformis	ESA-E
Cyperus trachysanthos	ESA-E
Cyrtandra crenata	ESA-E
Cyrtandra cyaneoides	ESA-E
Cyrtandra dentata	ESA-E
Cyrtandra ferripilosa	ESA-E
Cyrtandra filipes	ESA-E
Cyrtandra giffardii	ESA-E
Cyrtandra gracilis	ESA-E
Cyrtandra hematos	ESA-E
Cyrtandra kaulantha	ESA-E
Cyrtandra limahuliensis	ESA-T
Cyrtandra munroi	ESA-E
Cyrtandra nanawaleensis	ESA-E
Cyrtandra oenobarba	ESA-E
Cyrtandra oxybapha	ESA-E
Cyrtandra paliku	ESA-E
Cyrtandra polyantha	ESA-E
Cyrtandra sessilis	ESA-E
Cyrtandra subumbellata	ESA-E
Cyrtandra tintinnabula	ESA-E
Cyrtandra viridiflora	ESA-E
Cyrtandra wagneri	ESA-E
Cyrtandra waiolani	ESA-E
Cytinus spp.	Parasitic
Cyrtochloa spp.	NAPPRA