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

General:
Perennial aquatic herb from a thick, prostrate rhizome; stems slender; stolons lacking.

Leaves:
Floating, scattered loosely along the rhizome, without blotches or dots, heart-shaped, the blades 10-40 cm wide, 10-40 cm long, long-stalked.

Flowers:
Inflorescence of showy, fragrant flowers that open in the morning and close in the afternoon, 6-19 cm wide; petals white or rarely pink, 17-43, equal to or exceeding the sepals; sepals 4, 3-6.5 cm long; stamens yellow; stigmatic disk margin appendages 3-8 mm long.

Fruits:
Berry-like capsules, leathery, many-seeded, rupturing irregularly with a jelly-like seed mass; seeds egg-shaped, 1.5-2.5 mm long, 1.5-1.7 mm wide.