Helenium bigelovii |
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Bigelow's sneezeweed, tall sneezeweed, tall sneezweed |
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Habit | Perennials, 30–130 cm. |
Stems | 1–3(–10), unbranched or sparingly branched distally, weakly to moderately winged, glabrous proximally, glabrous or sparsely hairy distally. |
Leaves | glabrous or sparsely hairy; basal blades oblanceolate to oblong-elliptic, entire; proximal and mid blades lanceolate to oblong-elliptic, entire; distal blades linear to lanceolate, entire. |
Peduncles | (6–)10–30 cm, sparsely to moderately hairy. |
Involucres | hemispheric to globoid, 12–20 × (14–)17–22(–25) mm. |
Ray florets | 14–20, pistillate, fertile; corollas yellow, 13–25 × 5–10(–12) mm. |
Disc florets | 250–500(–800+); corollas yellow proximally, yellow to brown to purple distally, 3–4.4(–4.8) mm, lobes 5. |
Phyllaries | (connate proximally) moderately to densely hairy. |
Heads | 1–20 per plant, borne singly or in paniculiform arrays. |
Cypselae | 1.8–2.4 mm, moderately hairy; pappi of 6–8 entire, aristate scales 1.3–2.2(–2.7) mm. |
2n | = 32. |
Helenium bigelovii |
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Phenology | Flowering (May–)Jul–Aug(–Oct). |
Habitat | Bogs and swamps, around ponds and lakes, along streams, in moist meadows |
Elevation | 60–3400 m (200–11200 ft) |
Distribution |
CA; OR
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Source | FNA vol. 21, p. 432. |
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Gaillardiinae > Helenium |
Sibling taxa | |
Name authority | Torrey & A. Gray: in War Department [U.S.], Pacif. Railr. Rep. 4(5): 107. (1857) |
Web links |