| Botanical Name |
Authority |
| Hachettea spp. |
Parasitic |
| Hackelia venusta |
ESA-E |
| Hakea gibbosa |
NAPPRA |
| Hakea salicifolia |
NAPPRA |
| Hakea sericea |
NAPPRA |
| Halfordia spp. |
NAPPRA |
| Halophila johnsonii |
ESA-T |
| Haplophyllum spp. |
NAPPRA |
| Haplostachys haplostachya |
ESA-E |
| Harmandia spp. |
Parasitic |
| Harperella nodosa |
ESA-T |
| Harperocallis flava |
ESA-E |
| Harrisia aboriginum |
ESA-E |
| Harrisia fragrans |
ESA-T |
| Harrisia portoricensis |
ESA-T |
| Harrisonia spp. |
NAPPRA |
| Harveya spp. |
Parasitic |
| Hedbergia spp. |
Parasitic |
| Hedeoma todsenii |
ESA-E |
| Hedyotis megalantha |
ESA-E |
| Hedyotis purpurea var. montana |
ESA-E |
| Hedysarum boreale |
FSA-A |
| Heisteria spp. |
Parasitic |
| Helenium virginicum |
ESA-T |
| Helianthemum greenei |
ESA-T |
| Helianthus annuus |
FSA-A |
| Helianthus paradoxus |
ESA-T |
| Helianthus schweinitzii |
ESA-E |
| Helicanthes spp. |
Parasitic |
| Helietta spp. |
NAPPRA |
| Helixanthera spp. |
Parasitic |
| Helonias bullata |
ESA-T |
| Helosis spp. |
Parasitic |
| Hemizonia increscens ssp. villosa |
ESA-T |
| Heracleum mantegazzianum |
NW |
| Heritiera longipetiolata |
ESA-E |
| Hesperethusa spp. |
NAPPRA |
| Hesperidanthus argillaceus |
ESA-T |
| Hesperidanthus barnebyi |
ESA-T |
| Hesperidanthus suffrutescens |
ESA-T |
| Hesperolinon congestum |
ESA-T |
| Hesperomannia arborescens |
ESA-E |
| Hesperomannia arbuscula |
ESA-E |
| Hesperomannia lydgatei |
ESA-E |
| Heterotheca (= Pityopsis) ruthii |
ESA-E |
| Hexastylis naniflora |
ESA-T |
| Hibiscadelphus distans |
ESA-E |
| Hibiscadelphus giffardianus |
ESA-E |
| Hibiscadelphus hualalaiensis |
ESA-E |
| Hibiscadelphus woodii |
ESA-E |
| Hibiscus spp. |
Treatment |
| Hibiscus arnottianus ssp. immaculatus |
ESA-E |
| Hibiscus brackenridgei |
ESA-E |
| Hibiscus cannabinus |
FSA-A |
| Hibiscus clayi |
ESA-E |
| Hibiscus dasycalyx |
ESA-T |
| Hibiscus waimeae ssp. hannerae |
ESA-E |
| Hibiscus spp. |
Treatment |
| Hibiscus trionum |
NW |
| Hibiscus waimeae ssp. hannerae |
ESA-E |
| Hickelia spp. |
NAPPRA |
| Hiernia spp. |
Parasitic |
| Hilaria jamesii |
FSA-A |
| Himalayacalamus (= Thamnocalamus) spp. |
NAPPRA |
| Hitchcockella spp. |
NAPPRA |
| Hoffmannseggia tenella |
ESA-E |
| Holcus lanatus |
FSA-A |
| Holocarpha macradenia |
ESA-T |
| Holttumochloa spp. |
NAPPRA |
| Homeria spp. see Moraea spp. |
| Hordeum vulgare |
FSA-A |
| Hortia spp. |
NAPPRA |
| Houstonia purpurea v. montana |
ESA-T |
| Houzeaubambus (= Dendrocalamus) spp. |
NAPPRA |
| Hudsonia ericoides ssp. montana (also H. montana) |
ESA-T |
| Humblotiodendron spp. |
Rut. |
| Hydnora spp. |
Parasitic |
| Hydrilla verticillata |
NW |
| Hygrophila polysperma |
NW |
| Hylomyza spp. |
NW |
| Hymenoxys texana |
ESA-E |
| Hyobanche spp. |
Parasitic |
| Hypericum cumulicola |
ESA-E |
| Hypolepis hawaiiensis var. mauiensis |
ESA-E |
| Hypopitys spp. |
NW |
