Saw Toothed Goldenbush
Hazardia squarrosa var. grindelioides
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Bigelow's Sneezeweed
Helenium bigelovii
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Sneezeweed
Helenium puberulum
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California Helianthella
Helianthella californica
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Diablo Helianthella
Helianthella castanea
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Sunflower
Helianthus annuus
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Claremont Sunshine Sunflower
Helianthus annuus 'Claremont Sunshine'
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Serpentine Sunflower
Helianthus bolanderi
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California Sunflower
Helianthus californicus
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Slender Sunflower
Helianthus gracilentus
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Showy Goldeneye
Heliomeris multiflora
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Seaside Heliotrope
Heliotropium curassavicum
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Hayfield Tarweed
Hemizonia congesta
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Hayfield Tarweed
Hemizonia congesta ssp. congesta
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Hayfield Tarweed
Hemizonia congesta ssp. lutescens
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Hayfield Tarweed
Hemizonia congesta ssp. luzulifolia
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Desert Lily
Hesperocallis undulata
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California Hesperochiron
Hesperochiron nanus
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Dwarf Hesperochiron
Hesperochiron pumilus
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Baker's Cypress
Hesperocyparis bakeri
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Tecate Cypress
Hesperocyparis forbesii
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Gowen Cypress
Hesperocyparis goveniana
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McNab Cypress
Hesperocyparis macnabiana
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Monterey Cypress
Hesperocyparis macrocarpa
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Citriodora Monterey Cypress
Hesperocyparis macrocarpa 'Citriodora'
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Goldcrest Monterey Cypress
Hesperocyparis macrocarpa 'Goldcrest'
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Sargent's Cypress
Hesperocyparis sargentii
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Chaparral Yucca
Hesperoyucca whipplei
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Toyon
Heteromeles arbutifolia
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Golden Berry Toyon
Heteromeles arbutifolia 'Davis Gold'
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Telegraph Weed
Heterotheca grandiflora
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False Goldenaster
Heterotheca sessiliflora
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Bolander's Goldenaster
Heterotheca sessiliflora ssp. bolanderi
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San Bruno Mountain Sessileflower Goldenaster
Heterotheca sessiliflora ssp. bolanderi 'San Bruno Mountain'
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Bristly Goldenaster
Heterotheca sessiliflora ssp. echioides
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Camphorweed
Heterotheca subaxillaris ssp. latifolia
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Hairy False Goldenaster
Heterotheca villosa
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San Bruno Mountain Hairy Golden Aster
Heterotheca villosa 'San Bruno Mountain'
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Abrams' Alumroot
Heuchera abramsii
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Tall Alumroot
Heuchera chlorantha
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Island Alum Root
Heuchera maxima
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Merriam's Alumroot
Heuchera merriamii
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Paleface
Hibiscus denudatus
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Hairy-fruited Hibiscus
Hibiscus lasiocarpos
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Rose Mallow
Hibiscus lasiocarpos var. occidentalis
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Southern Hawkweed
Hieracium argutum
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Bolander's Hawkweed
Hieracium bolanderi
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Western Hawkweed
Hieracium scouleri
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James' Galleta
Hilaria jamesii
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Big Galleta
Hilaria rigida
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Leather Root
Hoita macrostachya
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Round Leaved Psoralea
Hoita orbicularis
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Heermann's Tarweed
Holocarpha heermannii
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Pitgland Tarweed
Holocarpha virgata
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Narrow Tarplant
Holocarpha virgata ssp. virgata
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Desert Ocean Spray
Holodiscus discolor var. glabrescens
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Little Leaf Creambush
Holodiscus discolor var. microphyllus
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Small Flowered Soaproot
Hooveria parviflora
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Meadow Barley
Hordeum brachyantherum
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Low Barley
Hordeum depressum