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General: Perennial aquatic herb from a thick large rhizome; stems thick, fleshy, submerged or emersed, 1-2 m long.
Leaves: Floating or submerged, long-stalked, the stalks 1-2 m long, appearing alternate from the rhizome, blades heart-shaped, 10-40 cm long, 6-30 cm wide, leathery.
Flowers: Inflorescence of solitary, large, waxy, floating flowers on long stalks arising from the rhizome; petals yellow (with reddish or greenish tinges), 10-20, smaller than the sepals and the numerous yellow or reddish-purple stamens; sepals usually 6 or 9, 2.5-6 cm long, the outer greenish and shorter than the inner yellow ones, thick.
Fruits: Berry-like capsules, oval, leathery, rupturing irregularly; seeds numerous in a jelly-like seed mass, the seeds 4-5 mm long.
Notes: Two species occur in BC:
1. Sepals usually 6, 2.5-3.5 cm long; stamens yellow; seeds about 5 mm long................... N. variegata (Durand) Beal
1. Sepals usually 9, (3) 3.5-6 cm long; stamens reddish or purplish; seeds about 4 mm long................... N. polysepala (Engelm.) Beal
Ponds and slow-moving streams in the lowland, steppe and montane zones; ssp. polysepala - common in BC south of 55Ã¦ N, rare in NW BC; ssp. variegata - infrequent in E BC; ssp. polysepala - N to AK, YT and NT and S to SD, CO and CA, ssp. variegata - N to YT and NT, E to NF and S to DE, OH, NE, MT and N ID.
Recommended citation: Author, Date. Page title. In Klinkenberg, Brian. (Editor) 2020. E-Flora BC:
Electronic Atlas of the Plants of British Columbia [eflora.bc.ca]. Lab for
Advanced Spatial Analysis, Department of Geography, University of British
Columbia, Vancouver. [Accessed:
2022-08-16 12:02:44 AM
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