Northern Island Haplopappus
Hazardia detonsa
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Orcutt's Bristleweed
Hazardia orcuttii
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Sawtooth Goldenbush
Hazardia squarrosa
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Saw Toothed Goldenbush
Hazardia squarrosa var. grindelioides
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Coastal Sneezeweed
Helenium bolanderi
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Diablo Helianthella
Helianthella castanea
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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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Hesperevax acaulis var. robustior
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False Goldenaster
Heterotheca sessiliflora
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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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Island Alum Root
Heuchera maxima
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California Horkelia
Horkelia californica
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California Horkelia
Horkelia californica var. californica
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Wedge Leaf Horkelia
Horkelia cuneata
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Kellogg's Horkelia
Horkelia cuneata var. sericea
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Seaside Bird's Foot Trefoil
Hosackia gracilis
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Satintail
Imperata brevifolia
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Douglas Iris
Iris douglasiana
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Point Reyes Douglas Iris
Iris douglasiana 'Point Reyes'
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Portuguese Beach Pacifica Iris
Iris douglasiana 'Portuguese Beach'
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Yellow Douglas Iris
Iris douglasiana 'Yellow'
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Menzies' Goldenbush
Isocoma menziesii
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Menzies' Goldenbush
Isocoma menziesii var. decumbens
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Annual Tule
Isolepis cernua
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Fleshy Jaumea
Jaumea carnosa
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Coast Jepsonia
Jepsonia parryi
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Spiny Rush
Juncus acutus
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Leopold's Rush
Juncus acutus ssp. leopoldii
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Soft Rush
Juncus effusus
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Corkscrew Rush
Juncus effusus 'Spiralis'
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Falcate Rush
Juncus falcatus
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Sickleleaved Rush
Juncus falcatus ssp. falcatus
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Brownhead Rush
Juncus phaeocephalus
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Coulter's Horseweed
Laennecia coulteri
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Leather-spineflower
Lastarriaea coriacea
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California Goldfields
Lasthenia californica
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California Goldfields
Lasthenia californica ssp. californica
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Royal Goldfields
Lasthenia coronaria
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Smooth Goldfields
Lasthenia glaberrima
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Coastal Goldfields
Lasthenia minor
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Beach Pea
Lathyrus japonicus
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Silky Beach Pea
Lathyrus littoralis
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Wild Sweetpea
Lathyrus vestitus var. vestitus
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Smooth Tidy Tips
Layia chrysanthemoides
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Tall Layia
Layia hieracioides
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Common Tidy Tips
Layia platyglossa
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Gander's Pitcher Sage
Lepechinia ganderi
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Shaggyfruit Pepperweed
Lepidium lasiocarpum
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Shaggyfruit Pepperweed
Lepidium lasiocarpum ssp. lasiocarpum
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Peppergrass
Lepidium nitidum
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Least Pepperweed
Lepidium virginicum
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Medium Pepperweed
Lepidium virginicum ssp. menziesii
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Scale Broom
Lepidospartum squamatum
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Lemmon's Linanthus
Leptosiphon lemmonii
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Narrowflower Flaxflower
Leptosiphon liniflorus
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Giant Coreopsis
Leptosyne gigantea
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Sea Dahlia
Leptosyne maritima