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

General:
Annual herb from a taproot; stems erect, solitary to numerous, simple to freely branched, 0.2-1.5 m tall, glabrous except glandular in the inflorescence.

Leaves:
Stem leaves alternate, broadly deltoid to egg-shaped, 5-20 cm long, shallow to prominently toothed or lobed, glabrous.

Flowers:
Inflorescence of somewhat dense clusters in large terminal panicles and sometimes in reduced lateral spikes or panicles, greenish; sepals of the fruiting plant not keeled.

Fruits:
Thin, wide, membranous envelopes; seeds strongly flattened, margins sharply angled, horizontal, surface finely pitted.