Seaside Alumroot
Heuchera pilosissima var. hemisphaerica
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Pink Alumroot
Heuchera rubescens
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Yosemite Pink Alumroot
Heuchera rubescens 'Yosemite'
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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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White Hawkweed
Hieracium albiflorum
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Southern Hawkweed
Hieracium argutum
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Bolander's Hawkweed
Hieracium bolanderi
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Greene's Hawkweed
Hieracium greenei
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Prickly Hawkweed
Hieracium horridum
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Naked-stemmed Hawkweed
Hieracium nudicaule
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Parry's Hawkweed
Hieracium parryi
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Western Hawkweed
Hieracium scouleri
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Slender Hawkweed
Hieracium triste
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James' Galleta
Hilaria jamesii
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Big Galleta
Hilaria rigida
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Common Mares Tail
Hippuris vulgaris
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Pig-nut
Hoffmannseggia glauca
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Wand Holdback
Hoffmannseggia microphylla
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Leather Root
Hoita macrostachya
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Round Leaved Psoralea
Hoita orbicularis
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Loma Prieta Hoita
Hoita strobilina
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False Spikeflower
Hollisteria lanata
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Rock Lady
Holmgrenanthe petrophila
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Heermann's Tarweed
Holocarpha heermannii
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Santa Cruz Tarplant
Holocarpha macradenia
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San Joaquin Tarweed
Holocarpha obconica
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Pitgland Tarweed
Holocarpha virgata
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Graceful Tarplant
Holocarpha virgata ssp. elongata
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Narrow Tarplant
Holocarpha virgata ssp. virgata
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Ocean Spray
Holodiscus discolor
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Holodiscus discolor var. discolor
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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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Whitecrown
Holozonia filipes
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Small Flowered Soaproot
Hooveria parviflora
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Purple Amole
Hooveria purpurea
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Santa Lucia Purple Amole
Hooveria purpurea var. purpurea
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Camatta Canyon Amole
Hooveria purpurea var. reducta
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Arizona Barley
Hordeum arizonicum
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Meadow Barley
Hordeum brachyantherum
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Meadow Barley
Hordeum brachyantherum ssp. brachyantherum
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California Meadow Barley
Hordeum brachyantherum ssp. californicum
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Low Barley
Hordeum depressum
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Bobtail Barley
Hordeum intercedens
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Foxtail Barley
Hordeum jubatum
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Foxtail Barley
Hordeum jubatum ssp. jubatum
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Border Horkelia
Horkelia bolanderi
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California Horkelia
Horkelia californica
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California Horkelia
Horkelia californica var. californica
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California Honeydew
Horkelia californica var. elata
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California Horkelia
Horkelia californica var. frondosa
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Cleveland's Horkelia
Horkelia clevelandii
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Horkelia clevelandii var. clevelandii
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Sierra Horkelia
Horkelia congesta
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Josephine Horkelia
Horkelia congesta var. nemorosa
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Wedge Leaf Horkelia
Horkelia cuneata
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Coast Horkelia
Horkelia cuneata var. cuneata
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Mesa Horkelia
Horkelia cuneata var. puberula