Page author: Don Knoke
Rigiopappus leptocladus
bristlehead, false wireweed
WTU specimens
Other herbaria

Distribution: Pacific Northwest to Utah and California; chiefly east of the Columbia River in Washington

Habitat: Dry, open areas at low elevations; sagebrush and grasslands areas

Flowers: April - June

Origin: Native

Conservation Status: Not of concern

Description:
General:

Nearly glabrous branching annual, up to 3 dm. tall, the lateral branches topping the central stem.

Leaves:

Leaves narrowly linear, erect, 1-3 cm. long, the lower deciduous;

Flowers:

Heads terminating the branches, 8-80 flowered; involucre 4-7 mm. high, its bracts narrow, sub-equal, partly clasping the outer achenes; ray flowers few, pistillate and fertile, mostly 5, 3 or 8, yellowish, 1.5-2 mm. long; disk flowers perfect and fertile, yellow; receptacle flat and naked except for a row or bracts separating the ray and disk flowers; pappus of 3-5 awn-like scales.

Fruits:

Achenes with fine hairs.

Accepted Name:
Rigiopappus leptocladus A. Gray
Publication: Proc. Amer. Acad. Arts. 6: 548. 1865. 1865.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Rigiopappus leptocladus in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Rigiopappus leptocladus checklist entry.

E-Flora BC: Rigiopappus leptocladus atlas page.

CalPhotos: Rigiopappus leptocladus photos.

USDA Plants: Rigiopappus leptocladus information.

16 photographs:
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