Persicaria nepalensis (Meisn.) Miyabe
Nepalese knotweed
Polygonaceae (Buckwheat family)
Introduction to Vascular Plants
Nepalese knotweed
Polygonaceae (Buckwheat family)
Introduction to Vascular Plants
Photograph
Species Information
General:
Annual herb from a fibrous root; stems decumbent, several, branched, 30-60 cm long.
Leaves:
Basal leaves lacking; stem leaves alternate, widely lanceolate to wedge-shaped, the blades 0.5-7 cm long, the stalks short, winged; stipules smooth, 2-6 mm long, fringed at the tips.
Flowers:
Inflorescence of several flowers in crowded, globe- or head-shaped axillary or terminal panicles; perianths green with pinkish margins, 2-2.5 mm long.
Fruits:
Achenes, 3-angled or lens-shaped, 1.5-2 mm long, roundish, black, pimply, shiny.
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
Mesic to dry disturbed sites and gravel bars in the lowland zone; locally frequent in SW BC (Vancouver area); recently introduced from Asia.Status Information
Synonyms
Synonyms and Alternate Names:
Persicaria nepalense (Meisn.) Miyabe
Polygonum alatum Buch.-Ham. ex D. Don
Polygonum nepalense Meisn.