Mendocino Tarplant
Hemizonia congesta ssp. calyculata
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Hayfield Tarweed
Hemizonia congesta ssp. clevelandii
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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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Tracy's Tarplant
Hemizonia congesta ssp. tracyi
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Cow Parsnip
Heracleum maximum
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Curly Herissantia
Herissantia crispa
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Stemless Dwarf Cudweed
Hesperevax acaulis
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Stemless Evax
Hesperevax acaulis var. acaulis
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Fire Evax
Hesperevax acaulis var. ambusticola
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Hesperevax acaulis var. robustior
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Hogwallow Starfish
Hesperevax caulescens
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Erect Dwarf Cudweed
Hesperevax sparsiflora
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Shortleaved Evax
Hesperevax sparsiflora var. brevifolia
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Erect Dwarf-cudweed
Hesperevax sparsiflora var. sparsiflora
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Jaeger's Caulostramina
Hesperidanthus jaegeri
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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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Western Nettle
Hesperocnide tenella
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Santa Cruz Cypress
Hesperocyparis abramsiana
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Santa Cruz Cypress
Hesperocyparis abramsiana var. abramsiana
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Hesperocyparis abramsiana var. butanoensis
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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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Piute Cypress
Hesperocyparis nevadensis
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Pygmy Cypress
Hesperocyparis pygmaea
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Sargent's Cypress
Hesperocyparis sargentii
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Cuyamaca Cypress
Hesperocyparis stephensonii
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Glandular Western Flax
Hesperolinon adenophyllum
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Two-carpellate Western Flax
Hesperolinon bicarpellatum
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Brewer's Western Flax
Hesperolinon breweri
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California Dwarf-flax
Hesperolinon californicum
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Allen Springs Dwarf-flax
Hesperolinon clevelandii
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Marin Western Flax
Hesperolinon congestum
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Lake County Western Flax
Hesperolinon didymocarpum
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Coast Range Dwarf Flax
Hesperolinon disjunctum
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Drymaria-like Western Flax
Hesperolinon drymarioides
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Smallflower Dwarf-flax
Hesperolinon micranthum
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Slender Dwarf-flax
Hesperolinon spergulinum
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Tehama County Western Flax
Hesperolinon tehamense
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Narrow-leaved Meconella
Hesperomecon linearis
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Chaparral Yucca
Hesperoyucca whipplei
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Water Star-grass
Heteranthera dubia
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Rareflower Heterocodon
Heterocodon rariflorum
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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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Monarch Goldenaster
Heterotheca monarchensis
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Oregon False Goldenaster
Heterotheca oregona
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Heterotheca oregona var. compacta
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Oregon Goldenaster
Heterotheca oregona var. oregona
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Heterotheca oregona var. rudis
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Heterotheca oregona var. scaberrima