Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
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HULSEA

Dieter H. Wilken

Annual to perennial herb
Stems 1–5, 1–15 dm, ± hairy, glandular
Leaves alternate; petioles generally ciliate; blades generally ± oblanceolate, entire to lobed, ± reduced upward
Inflorescence raceme-like; heads radiate, 1–many; bracts ± narrowly lanceolate; involucre hemispheric to obconic; phyllaries many, in 2–3 series, linear to obovate, green, ± glandular; receptacle naked
Ray flowers: ligules yellow to red
Disk flowers many; corollas 5–9 mm, yellow to orange, generally glabrous
Fruit 4–10 mm, linear to club-like, black, ± hairy; pappus scales generally 2 pairs, 4–10 mm, generally deeply cut, generally translucent
Species in genus: ± 8 species: w US
Etymology: (G.W. Hulse, US Army surgeon, botanist, 1807–1883)
Reference: [Wilken 1977 Madroño 24:48–55]
Self-sterile.
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