| Habenaria - Hemizonia
Habenaria orbiculata (1)
Habenaria rhodocheila (2)
Habenaria saccata (1)
Habranthus andersonii (3)
Hackelia amethystina (1)
Hackelia bella (2)
Hackelia brevicula (1)
Hackelia californica (11)
Hackelia cusickii (4)
Hackelia deflexa var. americana (1)
Hackelia diffusa var. arida (3)
Hackelia floribunda (5)
Hackelia micrantha (34)
Hackelia mundula (16)
Hackelia nervosa (12)
Hackelia patens (3)
Hackelia setosa (1)
Hackelia sharsmithii (2)
Hackelia sp. (1)
Hackelia velutina (18)
Hackelia venusta (2)
Hacquetia epipactis (6)
Haemanthus coccineus (8)
Hainardia cylindrica (5)
Hakea bucculenta (1)
Halesia carolina (4)
Halesia diptera (1)
Halesia tetraptera (4)
Halimeda opuntia (1)
Halimium atriplicifolium (1)
Halimium ocymoides (1)
Halimium viscosum (3)
Halimodendron halodendron (6)
Halimolobos jaegeri (5)
Halleria lucida (1)
Halogeton glomeratus (14)
Halosaccion glandiforme (3)
Halymenia santamariae (1)
Hamamelis virginiana (2)
Hamelia patens var. patens (1)
Hammarbya paludosa (2)
Handroanthus chrysotrichus (14)
Haplopappus macrocephalus (5)
Haplopappus stenophyllus (1)
Harfordia macroptera (2)
Harmonia doris-nilesiae (6)
Harmonia guggolziorum (2)
Harmonia nutans (5)
Harmonia stebbinsii (5)
Harpagonella palmeri (7)
Harrisia bonplandii (1)
Harrisia pomanensis (3)
Hastingsia alba (25)
Hastingsia bracteosa var. bracteosa (3)
Hastingsia serpenticola (5)
Hastingsia serpentinicola (8)
Haworthia renwardtii (1)
Hazardia cana (4)
Hazardia detonsa (3)
Hazardia squarrosa (13)
Hazardia squarrosa var. grindelioides (3)
Hazardia squarrosa var. obtusa (5)
Hazardia squarrosa var. squarrosa (1)
Hazardia whitneyi var. discoidea (1)
Hazardia whitneyi var. whitneyi (3)
Hebe epacridea (1)
Hebe macrocarpa var. brevifolia (1)
Hebe sp. (4)
Hebe speciosa (1)
Hecastocleis shockleyi (3)
Hechtia marnier-lepostollei (1)
Hechtia texensis (1)
Hedeoma drummondii (3)
Hedeoma nana ssp. californica (11)
Hedeoma nanum (2)
Hedeoma nanum ssp. californicum (4)
Hedeoma nanum var. californicum (5)
Hedeoma todsenii (1)
Hedera canariensis (4)
Hedera helix (16)
Hedera sp. (14)
Hedwigia ciliata (2)
Hedwigia stellata (2)
Hedychium gardnerianum (3)
Hedyotis procumbens (1)
Hedypnois cretica (19)
Hedypnois rhagadioloides (7)
Hedysarum coronarium (10)
Hedysarum hedysaroides ssp. exaltatum (8)
Hedysarum mackensii (1)
Hedysarum occidentale (1)
Hedysarum sp. (1)
Helenium amarum (2)
Helenium autumnale (16)
Helenium autumnale var. montanum (1)
Helenium bigelovii (74)
Helenium bolanderi (2)
Helenium pinnatifidum (2)
Helenium puberbulum (8)
Helenium puberulum (20)
Heliamphora heterodoxa (1)
Heliamphora minor (3)
Heliamphora nutans (5)
Heliamphora sp. (2)
Heliamphora tatei (3)
Helianthella californica (17)
Helianthella californica var. nevadensis (2)
Helianthella californica var. shastensis (2)
Helianthella castanea (11)
Helianthella castrensis (1)
Helianthella uniflora var. uniflora (3)
Helianthemum apenninum (2)
Helianthemum grandiflorum (4)
Helianthemum greenei (3)
Helianthemum nummularium (4)
Helianthemum oelandicum ssp. alpestre (3)
Helianthemum salicifolium (6)
Helianthemum scoparium (23)
Helianthemum suffratescens (3)
Helianthemum suffrutescens (7)
Helianthus angustifolius (1)
Helianthus annuus (41)
Helianthus anomala (2)
Helianthus bolanderi (11)
Helianthus californicus (12)
Helianthus ciliaris (10)
Helianthus cusicki (2)
Helianthus cusickii (2)
Helianthus decapetalus (7)
Helianthus deserticola (2)
Helianthus divaricatus (3)
Helianthus exilis (5)
Helianthus giganteus (2)
Helianthus gracilentus (4)
Helianthus niveus (1)
Helianthus niveus ssp. canescens (3)
Helianthus niveus ssp. tephrodes (4)
Helianthus nuttallii ssp. nuttallii (12)
Helianthus paradoxus (3)
Helianthus radula (1)
Helianthus sp. (9)
Helianthus tuberosus (18)
Helichrysum bracteatum (12)
Helichrysum italicum (7)
Helichrysum retortoides (2)
Helichrysum rutidolepis (3)
Helichrysum sp. (4)
Helichrysum splendidum (2)
Helichrysum subulifolium (2)
Helichrysum thianschanicum (2)
Heliconia bihai var. jacquinii (1)
Heliconia densiflora (2)
Heliconia vellerigera (1)
Heliomeris multiflora var. nevadensis (12)
Heliopsis helianthoides (18)
Heliotropium amplexicaule (1)
Heliotropium angiospermum (2)
Heliotropium arborescens (1)
Heliotropium convolvulaceum (1)
Heliotropium convolvulaceum var. californicum (4)
Heliotropium curassavicum (43)
Heliotropium curassavicum var. oculatum (1)
Heliotropium europaeum (8)
Heliotropium peruvanium (3)
Heliotropium polyphyllum (2)
Heliotropium sp. (2)
Helleborus argutifolius (1)
Helleborus dumetorum (4)
Helleborus foetidus (5)
Helleborus niger (26)
Helleborus odorus (4)
Helleborus orientalis (6)
Helminthotheca echioides (1)
Helodium blandowii (3)
Heloniopsis acutifolia (5)
Hemerocallis lilioasphodelus (5)
Hemerocallis middendorfii (6)
Hemerocallis sp. (18)
Hemipteris werneri (1)
Hemitomes congestum (9)
Hemizonella minima (9)
Hemizonia arida (12)
Hemizonia clementina (2)
Hemizonia congesta (3)
Hemizonia congesta ssp. clevelandii (5)
Hemizonia congesta ssp. congesta (9)
Hemizonia congesta ssp. leucocephala (1)
Hemizonia congesta ssp. lutescens (2)
Hemizonia congesta ssp. luzulifolia (14)
Hemizonia congesta ssp. tracyi (2)
Hemizonia conjugens (4)
Hemizonia corymbosa (13)
Hemizonia corymbosa ssp. corymbosa (2)
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Hemizonia - Hordeum
Hemizonia corymbosa ssp. macrocephala (1)
Hemizonia fasciculata (5)
Hemizonia fitchii (26)
Hemizonia floribunda (2)
Hemizonia halliana (1)
Hemizonia increscens ssp. increscens (4)
Hemizonia increscens ssp. villosa (4)
Hemizonia kelloggii (1)
Hemizonia lobbii (6)
Hemizonia luzulafolia (5)
Hemizonia minthornii (3)
Hemizonia mohavensis (14)
Hemizonia pallida (2)
Hemizonia paniculata (11)
Hemizonia parryi ssp. australis (5)
Hemizonia parryi ssp. congdonii (4)
Hemizonia parryi ssp. parryi (11)
Hemizonia parryi ssp. rudis (2)
Hemizonia pentactis (3)
Hemizonia pungens (4)
Hemizonia pungens ssp. laevii (1)
Hemizonia pungens ssp. laevis (1)
Hemizonia pungens ssp. maritima (2)
Hemizonia pungens ssp. pungens (7)
Hemizonia streetsii (2)
Hepatica acutiloba (2)
Hepatica americana (1)
Hepatica nobilis (18)
Hepatica nobilis var. acuta (13)
Heptapleurum arboricola (1)
Heracleum austriacum ssp. siifolium (3)
Heracleum mantegazzianum (3)
Heracleum maximum (61)
Heracleum sphondylium (9)
Herissantia crispa (3)
Herminium monorchis (1)
Hermodactylus tuberosus (7)
Herniaria glabra (4)
Herniaria hirsuta ssp. cinerea (9)
Herrania balaensis (1)
Hesperalbizia occidentalis (2)
Hesperevax acaulis var. acaulis (2)
Hesperevax acaulis var. ambusticola (3)
Hesperevax acaulis var. robustior (1)
Hesperevax caulescens (7)
Hesperevax sparsiflora (2)
Hesperevax sparsiflora var. brevifolia (2)
Hesperevax sparsiflora var. sparsiflora (3)
Hesperis matronalis (18)
Hesperocallis undulata (69)
Hesperocaulis undulata (1)
Hesperochiron californicus (15)
Hesperochiron pumilus (33)
Hesperochiron sp. (1)
Hesperocnide tenella (13)
Hesperolinon adenophyllum (5)
Hesperolinon breweri (6)
Hesperolinon californicum (6)
Hesperolinon clevelandii (1)
Hesperolinon congestum (16)
Hesperolinon disjunctum (3)
Hesperolinon drymarioides (5)
Hesperolinon micranthum (6)
Hesperolinon serpentinum (1)
Hesperolinon sharsmithiae (1)
Hesperolinon tehamense (3)
Hesperostipa comata (12)
Hesperostipa comata ssp. comata (5)
Hesperoyucca whipplei (4)
Heteranthemis viscidehirta (3)
Heteranthera dubia (3)
Heteranthera limosa (3)
Heterocodon rariflorum (18)
Heterodraba unilateralis (3)
Heteromeles arbutifolia (55)
Heteromeles arbutifolia var. arbutifolia (1)
Heteropappus crenatifolius (3)
Heteropappus hispidus (3)
Heteropappus meyendorfii (2)
Heteropogon contortus (15)
Heterothalamus alienus (1)
Heterotheca grandiflora (53)
Heterotheca mucronata (3)
Heterotheca oregona (7)
Heterotheca oregona var. compacta (2)
Heterotheca oregona var. oregona (2)
Heterotheca oregona var. rudis (1)
Heterotheca sessiliflora (4)
Heterotheca sessiliflora ssp. bolanderi (12)
Heterotheca sessiliflora ssp. echioides (13)
Heterotheca sessiliflora ssp. fastigiata (3)
Heterotheca sessiliflora ssp. sessiliflora (5)
Heterotheca villosa (4)
Heterotheca villosa var. villosa (4)
Heterotheca viscida (1)
Heuchera abramsii (1)
Heuchera cylindrica (2)
Heuchera cylindrica var. alpina (8)
Heuchera cylindrica var. glabella (5)
Heuchera duranii (5)
Heuchera elegans (1)
Heuchera glabra (1)
Heuchera hirsutissima (5)
Heuchera maxima (6)
Heuchera merriamii (3)
Heuchera micrantha (20)
Heuchera micrantha var. erubescens (3)
Heuchera parishii (4)
Heuchera parvifolia var. utahensis (2)
Heuchera pilosissima (9)
Heuchera rubescens (7)
Heuchera rubescens var. alpicola (11)
Heuchera sanguinea (1)
Heuchera sp. (5)
Hibbertia scandens (1)
Hibiscus aponeurus (1)
Hibiscus denudatus (14)
Hibiscus flavifolius (1)
Hibiscus lasiocarpus (20)
Hibiscus militaris (1)
Hibiscus moscheutos (1)
Hibiscus mutabilis (1)
Hibiscus rosa-sinensis (32)
Hibiscus sabdariffa (3)
Hibiscus schizopetalus (1)
Hibiscus sp. (10)
Hibiscus syriacus (9)
Hibiscus tilleaceus (1)
Hibiscus trionum (8)
Hieracium albiflorum (31)
Hieracium aurantiacum (10)
Hieracium caespitosum (3)
Hieracium dollineri (6)
Hieracium gracile (2)
Hieracium greenei (1)
Hieracium horridum (20)
Hieracium lachenalii (3)
Hieracium parryi (3)
Hieracium pilosella (14)
Hieracium pilosum (2)
Hieracium scabrum var. scabrum (3)
Hieracium scouleri (5)
Hieracium scouleri var. nudicaule (1)
Hieracium sp. (1)
Hieracium umbellatum (7)
Hieracium villosum (3)
Hieracleum maximum (2)
Hierochloe occidentalis (3)
Hierochloe odorata (12)
Hildenbrandia galapagensis (1)
Hillebrandia sandwicensis (2)
Himantoglossum adriaticum (2)
Hippeastrum sp. (2)
Hippobroma longiflora (2)
Hippocrepis comosa (11)
Hippocrepis unisiliquosa (5)
Hippophae rhamnoides (6)
Hippuris vulgaris (11)
Hiraea grandifolia (1)
Hiraea purpusii (2)
Hirschfeldia incana (30)
Hoffmannseggia glauca (13)
Hoffmannseggia sp. (1)
Hoffmannseggia trifoliata (1)
Hohenbergia blanchetii (33)
Hoita macrostachya (8)
Hoita orbicularis (4)
Hoita strobilina (39)
Holarrhena pubescens (2)
Holcoglossum flavescens (1)
Holcus lanatus (25)
Holcus mollis (6)
Hollisteria lanata (4)
Holocarpha heermannii (19)
Holocarpha macradenia (6)
Holocarpha virgata (10)
Holocarpha virgata ssp. elongata (5)
Holocarpha virgata ssp. virgata (2)
Holodiscus bousierii (1)
Holodiscus discolor (59)
Holodiscus dumosus (1)
Holodiscus glabrescens (1)
Holodiscus microphyllus (6)
Holodiscus microphyllus var. glabrescens (6)
Holodiscus microphyllus var. microphyllus (8)
Holozonia filipes (7)
Homalocladium platycladium (1)
Homalothecium sp. (4)
Homogyne alpina (4)
Honckenya peploides ssp. diffusa (1)
Hoodia gordonii (1)
Hordeum brachyantherum (9)
Hordeum depressum (2)
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Hordeum - Hyssopus
Hordeum intercedens (4)
Hordeum jubatum (12)
Hordeum leporinum (1)
Hordeum marinum (2)
Hordeum marinum ssp. gussoneanum (7)
Hordeum murinum (13)
Hordeum murinum sp. leporinum (1)
Hordeum murinum ssp. glaucum (1)
Hordeum murinum ssp. leporinum (6)
Hordeum sp. (1)
Hordeum vulgare (2)
Horkelia bolanderi (1)
Horkelia californica (4)
Horkelia californica ssp. dissita (3)
Horkelia californica ssp. frondosa (2)
Horkelia clevelandii (1)
Horkelia congesta ssp. nemorosa (1)
Horkelia cuneata (15)
Horkelia cuneata ssp. cuneata (1)
Horkelia cuneata ssp. puberula (5)
Horkelia cuneata ssp. sericea (2)
Horkelia daucifolia (5)
Horkelia daucifolia ssp. latior (2)
Horkelia fusca (8)
Horkelia fusca ssp. parviflora (14)
Horkelia hendersonii (7)
Horkelia hispidula (4)
Horkelia marinensis (12)
Horkelia parryi (25)
Horkelia rydbergii (7)
Horkelia sericata (7)
Horkelia sp. (2)
Horkelia tenuiloba (3)
Horkelia tridentata (7)
Horkelia tridentata ssp. tridentata (1)
Horkelia truncata (9)
Horkelia tularensis (3)
Horkelia wilderae (4)
Horkelia yadonii (3)
Horkeliella congdonis (14)
Horkeliella purpurascens (1)
Hormidium prismatocarpum (1)
Horminum pyrenaicum (5)
Horsfordia alata (1)
Horsfordia newberryi (5)
Hosta siboldiana (1)
Hosta sp. (6)
Hosta tokudama (1)
Hosta undulata (1)
Hosta ventricosa (2)
Houlletia wallisii (2)
Houstonia caerulea (2)
Houstonia rubra (4)
Houttuynia cordata (4)
Howellia aquatilis (1)
Hoya wibergiae (1)
Huernia confusa (1)
Huernia keniensis (2)
Hulsea algida (19)
Hulsea brevifolia (26)
Hulsea californica (24)
Hulsea heterochroma (20)
Hulsea nana (13)
Hulsea vestita (8)
Hulsea vestita ssp. callicarpha (5)
Hulsea vestita ssp. gabrielensis (8)
Hulsea vestita ssp. parryi (7)
Hulsea vestita ssp. pygmaea (5)
Hulsea vestita ssp. vestita (8)
Hulsea vestita var. vestita (1)
Humata werneri (1)
Humulus lupulus (17)
Huperzia brassii (1)
Huperzia copelandiana (1)
Huperzia copelandii (1)
Huperzia foliosa (1)
Huperzia lucidula (1)
Huperzia parksii (1)
Huperzia reflexa (1)
Huperzia selago (6)
Huperzia trifoliata (1)
Huperzia vanikorensis (1)
Hutchinsia procumbens (4)
Hyacinthoides non-scripta (1)
Hyacinthoides x massartiana (3)
Hyacinthus orientalis (6)
Hydnophytum formicarum (2)
Hydrangea anomala ssp. petiolaris (2)
Hydrangea arborescens (1)
Hydrangea aspera (1)
Hydrangea macrophylla ssp. serrata (1)
Hydrangea paniculata (2)
Hydrangea quercifolia (4)
Hydrangea serrata (1)
Hydrangea sp. (1)
Hydrastis canadensis (2)
Hydrilla verticillata (24)
Hydrocharis morsus-ranae (2)
Hydrocotyle ranunculoides (1)
Hydrocotyle sibthorpioides (1)
Hydrocotyle sp. (1)
Hydrocotyle umbellata (7)
Hydrocotyle verticillata (1)
Hydrocotyle verticillata var. triradiata (1)
Hydrolea corymbosa (1)
Hydrophyllum capitatum (1)
Hydrophyllum capitatum var. alpinum (26)
Hydrophyllum capitatum var. capitatum (4)
Hydrophyllum fendleri (1)
Hydrophyllum occidentale (30)
Hydrophyllum sp. (1)
Hydrophyllum tenuipes (5)
Hydrophyllum virginianum (3)
Hygrophila polysperma (2)
Hylocereus costaricensis (1)
Hylocereus sp. (1)
Hylocereus triangularis (1)
Hylocereus undatus (7)
Hylocomium splendens (2)
Hylomecon japonicum (1)
Hylomecon vernalis (3)
Hylotelephium erythrostictum fa. variegatum (1)
Hylotelephium sieboldii (3)
Hylotelephium spectabile (6)
Hylotelephium telephium ssp maximum (1)
Hylotelephium telephium ssp. maximum (8)
Hylotelephium telephium ssp. telephium (8)
Hymenaea courbaril (2)
Hymenocallis caroliniana (3)
Hymenocallis latifolia (1)
Hymenocallis occidentalis var. occidentalis (1)
Hymenocallis sp. (1)
Hymenoclea monogyra (2)
Hymenoclea salsola (22)
Hymenoclea salsola ssp. salsola (1)
Hymenoclea salsola var. hybrid (5)
Hymenoclea salsola var. pentalepis (9)
Hymenoclea salsola var. salsola (2)
Hymenopappus filifolius (6)
Hymenopappus filifolius var. eriopodus (6)
Hymenopappus filifolius var. lugens (5)
Hymenopappus filifolius var. megacephalus (2)
Hymenopappus filifolius var. nanus (2)
Hymenophyllum digitatum (10)
Hymenophyllum involucratum (1)
Hymenophyllum leptocarpum (1)
Hymenophyllum pallidum (6)
Hymenophyllum polyanthos (7)
Hymenophyllum tunbridgense (3)
Hymenophyllum wilsonii (1)
Hymenoxys acaulis ssp. caespitosa (1)
Hymenoxys acaulis var. arizonica (8)
Hymenoxys cooperi (8)
Hymenoxys cooperi var. canescens (10)
Hymenoxys hoopesii (14)
Hymenoxys lemmonii (8)
Hyoscyamus albus (11)
Hyoseris radiata (9)
Hyoseris scabra (1)
Hyparrhenia hirta (6)
Hypecoum imberbe (3)
Hypericum anagallioides (4)
Hypericum anagalloides (26)
Hypericum calycinum (1)
Hypericum canadense (3)
Hypericum canariense (13)
Hypericum concinnum (16)
Hypericum crux-andraea (1)
Hypericum formosum (4)
Hypericum formosum ssp. scouleri (2)
Hypericum formosum var. scouleri (23)
Hypericum gebleri (6)
Hypericum hirsutum (4)
Hypericum kouytchense (1)
Hypericum patulum (1)
Hypericum perforatum (53)
Hypericum prolificum (7)
Hypericum scouleri ssp. scouleri (2)
Hypericum tetrapetalum (1)
Hypericum triquetrifolium (7)
Hypochaeris glabra (26)
Hypochaeris radicata (29)
Hypochoeris achyrophorus (6)
Hypoglossum abyssicola (1)
Hypolepis minima (1)
Hypolepis sparsisora (1)
Hypopitys monotropa (3)
Hypopitys uniflora (5)
Hypoxis hirsuta (2)
Hypoxis obtusa (1)
Hyptis emoryi (27)
Hyssopus officinalis (3)
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