Distribution: Chiefly east of the Cascades in Washington; British Columbia south to Baja California, east to Alberta and Texas.
Habitat: Dry ground from the plains to the lower mountains.
Conservation Status: Not of concern
Monoecious, glabrous annuals with freely-branched, prostrate stems 0.5-3 dm. long.
: Leaves opposite, 5-15 mm. long, obliquely oblanceolate to oblong-ovate, serrulate near the tips; stipules lanceolate, 0.5-1.5 mm. long, usually lacerate.
Flowers tiny, monoecious, borne in axillary involucres; staminate flowers numerous, naked, each consisting of a single stamen; pistillate flower single and terminal in the involucre; involucre bearing 4 glands with sunken centers, separated by lobed, whitish appendages.
Capsules smooth, 1.5-2 mm. long; seeds 1.2 mm. long, grayish-brown, prismatic.