Page authors: Don Knoke, David Giblin
Psilocarphus brevissimus
dwarf woolly-marbles
WTU specimens
Other herbaria

Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.

Habitat: Dried beds of vernal pools.

Flowers: May-July

Origin: Native

Conservation Status: Not of concern


Small, woolly, monoecious annuals, usually prostrate and branching, the stems up to 10 cm. long.


Leaves opposite, mostly lance-oblong to lance-linear, 5-25 mm. long and 2-5 mm. wide, usually well-surpassing the heads.


: Pistillate flowers 8-80 in each head, the corolla filiform-tubular, each enclosed by a saccate, woolly bract about 3 mm. long attached to the receptacle; receptacle lobed, each lobe bearing a cluster of as few staminate flowers; involucre none, but the heads subtended by several foliage leaves; pappus none; style off-set.


Achenes obliquely lanceolate, flattened, 1.0-1.9 mm. long.

Accepted Name:
Psilocarphus brevissimus Nutt.
Publication: Trans. Amer. Philos. Soc., n. s. 7: 340. 1840.

Synonyms & Misapplications:
(none provided)
var. brevissimus – dwarf woolly-marbles
Additional Resources:

PNW Herbaria: Specimen records of Psilocarphus brevissimus in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Psilocarphus brevissimus checklist entry.

E-Flora BC: Psilocarphus brevissimus atlas page.

CalPhotos: Psilocarphus brevissimus photos.

USDA Plants: Psilocarphus brevissimus information.

22 photographs:
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