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

General:
Perennial herb from overwintering stem-bases; stems decumbent or ascending, often trailing, 0.2-1.0 m long, glabrous below, glandular-hairy above.

Leaves:
Leaves opposite, egg-shaped-long-pointed with a heart-shaped base and wavy margins, 2-8 cm long, lower leaves short-stalked, upper leaves unstalked; stipules lacking.

Flowers:
Inflorescence in a 2-parted cluster with leaf-like bracts, the flowers so appearing solitary; petals white, to 12 mm long, deeply 2-cleft; sepals egg-shaped, 7-9 mm long, with membranous margins.

Fruits:
Capsules egg-shaped, up to 1 cm long, drooping; seeds brown, 0.4 mm long, with dense, barbed pimples.