General: Fronds annual, free-floating, round to egg-shaped, (3) 5-10 mm long, purplish beneath, stalked, in single or small groups, 5- to 11-nerved, with 5 to 15 rootlets.
Flowers: Usually 3 per pouch, 2 male, 1 female, enclosed in 2 lateral budding pouches sheathed by a minute membrane.
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.
The table below shows the species-specific information calculated from original data (BEC database) provided by the BC Ministry of Forests and Range. (Updated August, 2013)
Ponds and slow-moving streams in the lowland, steppe and montane zones; frequent in SW and SC BC, infrequent elsewhere except absent on N Vancouver Island, the Queen Charlotte Islands and NW BC; circumpolar, E to PQ and NS and S to FL, MS, TX, NM, AZ, CA and MX; Eurasia, S America.
