Rose Mallow
Hibiscus lasiocarpos var. occidentalis
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Leather Root
Hoita macrostachya
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Round Leaved Psoralea
Hoita orbicularis
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Ocean Spray
Holodiscus 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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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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Seaside Bird's Foot Trefoil
Hosackia gracilis
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Streambank Lotus
Hosackia oblongifolia
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Narrow-leaved Lotus
Hosackia oblongifolia var. oblongifolia
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Meadow Birdsfoot Trefoil
Hosackia pinnata
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Floating Marsh Pennywort
Hydrocotyle ranunculoides
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Marsh Pennywort
Hydrocotyle umbellata
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Whorled Marsh Pennywort
Hydrocotyle verticillata
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Fendler's Waterleaf
Hydrophyllum fendleri
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White Waterleaf
Hydrophyllum fendleri var. albifrons
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California Waterleaf
Hydrophyllum occidentale
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Hoope's Sneezeweed
Hymenoxys hoopesii
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Tinker's Penny
Hypericum anagalloides
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Satintail
Imperata brevifolia
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Central Coast Iris
Iris longipetala
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Western Blue Flag
Iris missouriensis
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Alkali Goldenbush
Isocoma acradenia
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Menzies' Goldenbush
Isocoma menziesii var. decumbens
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Satan's Goldenbush
Isocoma menziesii var. diabolica
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Menzies' Goldenbush
Isocoma menziesii var. menziesii
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Menzies' Goldenbush
Isocoma menziesii var. sedoides
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Green-leaved Dune Goldenbush
Isocoma menziesii var. vernonioides
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Bolander's Quillwort
Isoetes bolanderi
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Spiny Quillwort
Isoetes echinospora
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Howell's Quillwort
Isoetes howellii
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Nuttall's Quillwort
Isoetes nuttallii
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Western Quillwort
Isoetes occidentalis
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Orcutt's Quillwort
Isoetes orcuttii
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Keeled Bulrush
Isolepis carinata
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Annual Tule
Isolepis cernua
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Poverty Weed
Iva axillaris
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King's Mousetail
Ivesia kingii
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Clubmoss Mousetail
Ivesia lycopodioides
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Clubmoss Mousetail
Ivesia lycopodioides var. lycopodioides
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Clubmoss Mousetail
Ivesia lycopodioides var. megalopetala
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Clubmoss Mousetail
Ivesia lycopodioides var. scandularis
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Fleshy Jaumea
Jaumea carnosa
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Taper Tip Rush
Juncus acuminatus
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Leopold's Rush
Juncus acutus ssp. leopoldii
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Jointed Rush
Juncus articulatus
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Baltic Rush
Juncus balticus
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Bolander's Rush
Juncus bolanderi
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Salt
Juncus breweri
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Moss Rush
Juncus bryoides
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Toad Rush
Juncus bufonius
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Toad Rush
Juncus bufonius var. bufonius
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Clustered Toad Rush
Juncus bufonius var. congestus
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Western Toad Rush
Juncus bufonius var. occidentalis