General:
Perennial herb from a short, stout rhizome; flowering stems robust, erect, 0.7-2 m tall, often clustered, unbranched, leafy and short-hairy to woolly throughout or smooth in lower half.

Leaves:
Stem leaves numerous, broadly egg-shaped to oblong-elliptic, 10-35 cm long, 5-15 cm wide, becoming smaller and narrower towards the inflorescence, prominently ribbed (accordion-pleated), smooth above, densely hairy beneath, unstalked or nearly so, clasping at the base, the margins entire; basal leaves lacking.

Flowers:
Inflorescence a branched terminal cluster, the branches elongate, narrow, densely hairy, and at least the lower drooping, of numerous, stalked flowers, the stalks 2-3 (5) mm long, turning up as the flowers open; flowers pale green or yellow-green, with dark green centres, star-shaped, of 6 similar, distinct tepals, the tepals narrowly lanceolate to oblong-elliptic, 6-13 mm long, somewhat woolly-hairy on the outside, the margins minutely toothed to fringed; stamens 6; pistil 1, 3-chambered.

Fruits:
Capsules, barrel-shaped, 3-lobed, erect, 1.5-3 cm long, mostly smooth; seeds numerous, flat, broadly winged, 8-10 mm long.

Source:  The Illustrated Flora of British Columbia