General:
Annual herb from a slender taproot; stems ascending to erect, simple, several, 1-35 cm tall.

Leaves:
Basal leaves few to many, spreading to erect, more or less equal in size, elliptic to round-deltate, the blades 0.5-4 cm long, tapered abruptly to the stalk, the stalks up to 20 cm long; stem leaves paired, opposite, fused on both margins, forming a disk less than 5 cm wide.

Flowers:
Inflorescence of whorled racemes with 5-40 flowers on stalks 1-10 cm long or unstalked, with one bract subtending the lowest flower; petals 5, white or pinkish, 2-6 mm long; sepals 2, 1.5-5 mm long.

Fruits:
Capsules; seeds 3, round to egg-shaped, black, shiny, smooth (at 20x magnification), the appendages white, fleshy, 1-2.7 mm long.

Source:  The Illustrated Flora of British Columbia