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Introduction
European water-plantain is an introduced emergent wetland species found along stream lake and pond edges that is native to Eurasia. It is now found in North America in Washington, Alaska (USDA 2010) and British Columbia. In British Columbia, it is reported from several locations, mostly in the southern half of the province.
According to the BC Conservation Data Centre (2010) data files "In the past, the native North American species were lumped with this taxon, either as the same species or as variety americanum or triviale... It does appear however that plants with pinkish petals and slightly different styles and anthers are inttoduced plants of the Eurasian A. plantago-aquatica." Plants are up to 1 m in height. Leaves are broadly ovate to broadly lanceolate, flowers and fruits appear in late summer (Flora North America Online 2010).
Species Information
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expanded illustration for this species.
1. Leaf blades broadly lanceolate to egg-shaped; petals usually white.............Alisma triviale
1. Leaf blades linear, lanceolate or narrowly lanceolate; petals pink, pinkish or white.
2. Inflorescence overtopping the leaves; petals 4.5-6.5 mm long, pink or sometimes purplish-pink..............Alisma lanceolatum
2. Inflorescence usually not overtopping the leaves; petals 2.5-3.5 mm long, pink or white.........Alisma gramineum
Source: The Illustrated Flora of British Columbia
Habitat / Range
Shallow ponds, marshes and ditches in the lowland, steppe and montane zones; common in S BC south of 52degreeN; rare northward; E to NF and S to ME, VA, NE, NM, AZ and CA.
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)
