Wolffia borealis (Engelm. ex Hegelm.) Landolt ex Landolt & Wildi
northern water-meal (northern watermeal)
Lemnaceae
Introduction to Vascular Plants
northern water-meal (northern watermeal)
Lemnaceae
Introduction to Vascular Plants
Photograph
Species Information
General:
Fronds annual, free-floating, elliptic to egg-shaped, nearly twice as long as wide, 0.5-1.2 mm long, dark green, upper surface flat with 15 to 100 stomates, usually in unequal pairs, rootless, with a pouch at the basal end from which young plants arise.
Flowers:
Two, together on the upper surface, 1 female, 1 male; stamen 1; pistil 1.
Fruits:
Utricles (inflated fruits), globe-shaped; seeds 1, smooth.
Illustration
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
Habitat and Range
Ponds, lakes and slow-moving streams in the lowland and montane zones; rare in the lower Fraser Valley and SE BC (Creston); disjunct in ON and PQ and S to CT, NC, TN, MO, KS, CO, UT and CA.Status Information
| Origin Status | Provincial Status | BC List (Red Blue List) | COSEWIC |
|---|---|---|---|
| Native | S3S4 (2019) | Yellow | Not Listed |
BC Ministry of Environment: BC Species and Ecosystems Explorer.
Synonyms
Synonyms and Alternate Names:
Wolffia punctata auct. non Griseb.