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Bigelow's sneezeweed, tall sneezeweed, tall sneezweed

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

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
from FNA
CA; OR
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 21, p. 432.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Gaillardiinae > Helenium
Sibling taxa
H. amarum, H. arizonicum, H. autumnale, H. bolanderi, H. brevifolium, H. campestre, H. drummondii, H. elegans, H. flexuosum, H. linifolium, H. microcephalum, H. pinnatifidum, H. puberulum, H. quadridentatum, H. thurberi, H. vernale, H. virginicum
Name authority Torrey & A. Gray: in War Department [U.S.], Pacif. Railr. Rep. 4(5): 107. (1857)
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