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According to Ceska and Ceska (2010), this species is "Native to North America, northern Europe and eastern Asia, widespread in North America (except Texas and SE states). Stem whitish, leaves with smaller number of "untidy" segments. Winter buds frequent, cylindrical."
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General: Perennial aquatic from a short rhizome, stems 10-150 cm long, simple or forked, purplish, becoming white when dry.
Leaves: In whorls of 3 or 4 mostly 1 cm or more apart, those of the middle whorls usually 3 cm long or more, simply pinnate with 11 or fewer segments; segments commonly more than 1.5 cm long, rather widely and irregularly spaced about 2-4 mm apart; winter buds well developed, 1-4 cm long, oval in outline, broadest in the middle.
Flowers: Spikes almost naked, emergent, erect, to about 15 cm long; flowers in whorls, the lowermost female, the upper ones male, bright pink-red; the bract leaves shorter than flowers and fruits; petals oblong, concave, about 2.5 mm long; stamens 8.
Fruits: Mericarps, 4, nearly round, 2-3 mm long, rounded on the back, glabrous or slightly wrinkled.
Notes: In Hitchcock et al. (1961) plants of these species would key out as "Myriophyllum spicatum var. spicatum."
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:
2020-08-05 10:13:48 AM
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