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Bigelow's sneezeweed, tall sneezeweed

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.

Leaves

oblanceolate to lanceolate or elliptic, 7–30 cm, bases attenuate or truncate, decurrent;

margins entire;

tips acute or acuminate;

surfaces glabrous.

Involucres

(14)17–22(25) mm in diameter.

Ray florets

14–20;

corollas 12–25 mm, yellow.

Disc florets

250–500+;

corollas 3–4.5 mm, yellow, sometimes brownish to purplish distally.

Phyllaries

linear, 4–7 mm;

surfaces puberulent.

Fruits

1.8–2.4 mm, brown, glabrous or hispid-pubescent, pappi of 6–8 aristate scales, 1.3–2.5 mm.

Heads

1–20, radiate;

peduncles sparsely to moderately hairy.

2n

=32.

Helenium flexuosum

Helenium bigelovii

Distribution
[WildflowerSearch map]
[BONAP county map]
[WildflowerSearch map]
[BONAP county map]
Discussion

Meadows, bogs, swamps, thickets, seepage slopes, streambanks, serpentine. Flowering May–Aug. 0–2300 m. Casc, CR, ECas, Sisk. CA. Native.

Source Flora of Oregon, volume 2, page 279
Kenton Chambers
Sibling taxa
H. autumnale, H. bigelovii, H. bolanderi, H. puberulum
H. autumnale, H. bolanderi, H. puberulum
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