Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to Idaho and Montana.
Habitat: Dried beds of vernal pools and other open, moist places.
Conservation Status: Not of concern
Small, silky-woolly, monoecious annuals, varying from erect, branched plants to 15 cm. tall to plants with a single head only 1 cm. tall.
Leaves opposite, liner-oblong, up to 3.5 cm. long and 6 mm. wide.
Pistillate flowers usually 50-80 in each head, the corolla filiform-tubular, each enclosed by a saccate bract about 3 mm. long attached to the receptacle; heads usually strongly surpassed by their subtending leaves; receptacle lobed, each lobe bearing a cluster of a few staminate flowers; involucre none; pappus none; style apical.
Achenes narrowly oblong, swollen, 1.0-1.7 mm. long.