Helenium flexuosum |
Helenium bigelovii |
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Bigelow's sneezeweed, tall sneezeweed |
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Habit | Plants perennial, 3–13 dm. | |
Stems | unbranched or with 1–3 branches, usually glabrous or puberulent distally to sparsely tomentose below heads, rarely densely long-tomentose distally. |
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Leaves | oblanceolate to lanceolate or elliptic, 7–30 cm, bases attenuate or truncate, decurrent; margins entire; tips acute or acuminate; surfaces glabrous. |
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Involucres | (14)17–22(25) mm in diameter. |
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Ray florets | 14–20; corollas 12–25 mm, yellow. |
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Disc florets | 250–500+; corollas 3–4.5 mm, yellow, sometimes brownish to purplish distally. |
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Phyllaries | linear, 4–7 mm; surfaces puberulent. |
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Fruits | 1.8–2.4 mm, brown, glabrous or hispid-pubescent, pappi of 6–8 aristate scales, 1.3–2.5 mm. |
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Heads | 1–20, radiate; peduncles sparsely to moderately hairy. |
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2n | =32. |
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Helenium flexuosum |
Helenium bigelovii |
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Distribution | ||
Discussion | Meadows, bogs, swamps, thickets, seepage slopes, streambanks, serpentine. Flowering May–Aug. 0–2300 m. Casc, CR, ECas, Sisk. CA. Native. |
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Source | Flora of Oregon, volume 2, page 279 Kenton Chambers |
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Sibling taxa | ||
Web links |