Page authors: Don Knoke, David Giblin
Rigiopappus leptocladus
bristlehead, false wireweed

Distribution: Occurring east of the Cascades crest in south-central Washington; Washington to California, east to Idaho and Nevada.

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

Flowers: April-June

Origin: Native

Conservation Status: Not of concern


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


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


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.


Achenes with fine hairs.

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