Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the northern Great Plains and Rocky Mountains.
Habitat: Dried beds of vernal pools.
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.