General:
Perennial aquatic herb from a stout rhizome; stems solitary, 100-150 cm tall.

Leaves:
All basal, erect or floating in deep water, linear, twisted, 50-100 cm long, 0.5-1 cm wide.

Flowers:
Inflorescence of numerous flowers on slender stalks in an umbel; perianth 2-2.5 cm wide, long-stalked, the stalks 5-10 cm long, subtended by narrowly triangular bracts; petals 3, pink, more deeply coloured on the outside; sepals 3, greenish outside along the midribs, nearly as long as the petals; stamens 9.

Fruits:
Follicles, 6, beaked, about 1 cm long; seeds straight, lined.

Source:  The Illustrated Flora of British Columbia

If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

Illustration Source:  The Illustrated Flora of British Columbia