E-Flora BC: Electronic Atlas of the Flora of British Columbia

General:
Perennial herb from a creeping rhizome; stems prostrate or ascending to erect, several, branched, round, smooth or sometimes short spreading-hairy below, 30-120 cm tall/long.

Leaves:
Basal leaves few, soon deciduous; stem leaves in whorls of 6-8, sometimes 4 on the smaller branches, linear to oblanceolate, 1-3 cm long, 1-veined, short stiff-hairy on the margins, unstalked.

Flowers:
Inflorescence loose terminal clusters of many stalked flowers on branchlets in most upper axils; corollas saucer-shaped, whitish, 2-4 mm wide, 4-lobed; calyces obsolete.

Fruits:
Nutlets, 2, 1-1.5 mm long, smooth.