Gumweed
Grindelia stricta var. platyphylla
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Oregon Gumweed
Grindelia stricta var. stricta
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Suisun Gumplant
Grindelia x paludosa
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California Matchweed
Gutierrezia californica
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Sticky Snakeweed
Gutierrezia microcephala
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Matchweed
Gutierrezia sarothrae
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Amethyst Stickseed
Hackelia amethystina
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Greater Showy Stickseed
Hackelia bella
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California Stickseed
Hackelia californica
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Cusick's Stickseed
Hackelia cusickii
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Many-flowered Stickseed
Hackelia floribunda
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Jessica Sticktight
Hackelia micrantha
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Pink-flowered Stickseed
Hackelia mundula
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Sierran Stickseed
Hackelia nervosa
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Bristly Stickseed
Hackelia setosa
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Sharsmith's Stickseed
Hackelia sharsmithii
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Velvety Stickseed
Hackelia velutina
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Brickell Goldenbush
Hazardia brickellioides
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Guadalupe Hazardia
Hazardia cana
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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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Hazardia squarrosa var. obtusa
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Hazardia squarrosa var. squarrosa
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Serpentine Bristleweed
Hazardia stenolepis
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Whitney's Bristleweed
Hazardia whitneyi
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Hazardia whitneyi var. whitneyi
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Common Sneezeweed
Helenium autumnale
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Bigelow's Sneezeweed
Helenium bigelovii
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Coastal Sneezeweed
Helenium bolanderi
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Sneezeweed
Helenium puberulum
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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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Cusick's Sunflower
Helianthus cusickii
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Slender Sunflower
Helianthus gracilentus
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Newhall Sunflower
Helianthus inexpectatus
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Showy Sunflower
Helianthus niveus
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Algodones Dunes Sunflower
Helianthus niveus ssp. tephrodes
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Nuttall's Sunflower
Helianthus nuttallii
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Nuttall's Sunflower
Helianthus nuttallii ssp. nuttallii
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Los Angeles Sunflower
Helianthus nuttallii ssp. parishii
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Prairie Sunflower
Helianthus petiolaris
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Gray Desert Sunflower
Helianthus petiolaris ssp. canescens
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Seaside Heliotrope
Heliotropium curassavicum
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Seaside Heliotrope
Heliotropium curassavicum var. oculatum
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Hayfield Tarweed
Hemizonia congesta
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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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Gowen Cypress
Hesperocyparis goveniana
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McNab Cypress
Hesperocyparis macnabiana
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Piute Cypress
Hesperocyparis nevadensis