E-Flora BC: Electronic Atlas of the Flora of British Columbia

Potamogeton foliosus Raf.
closed-leaved pondweed (leafy pondweed)
Potamogetonaceae (Horned pondweed family)

Introduction to Vascular Plants
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Distribution of Potamogeton foliosus
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Species Information

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General:
Perennial, aquatic herb from fine, tufted roots; stems up to 100 cm long, extensively branched.
Leaves:
All submersed, linear, the sides parallel, thin, green, 1-9 cm long, 0.3-2.5 mm wide, usually with 3 veins, unstalked, the tips pointed, the stipules 0.5-1 cm long, delicate, not fibrous, greenish or brownish, the margins fused towards the bases, the veins evident as ridges running the entire length, the glands either lacking or poorly developed.
Flowers:
Inflorescence spikelike, the spikes 0.5-1.5 cm long, with 2 to 5 whorls of flowers, the stalks thin; bases of winter buds soft, smooth.
Fruits:
Achenes, egg-shaped, 1.5-2.5 mm long, 1.2-2 mm wide, widest in the middle, the beaks short stubby, the keels strongly developed, winged.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Lakes, ponds and ditches in the lowland, steppe and montane zones; frequent in BC south of 55 degrees N, rare in N BC, N to AK and YT, E to NF and S to ME, MA, PA, NC, FL, MS, LA, TX, NM, AZ and CA; Mexico.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Potamogeton foliosus

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)

Site Information
Value / Class

Minimum

Average

Maximum

Elevation (metres) 60 611 1147
Slope Gradient (%) 0 0 0
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
0
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
5 7 8
Modal Nutrient Regime
Class
C
Number of field plots
 species was recorded in:
15
Modal BEC Zone Class
SBS
All BEC Zones (# of stations/zone) species was recorded in: CWH(2), IDF(1), SBS(12)

Climate

The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Potamogeton foliosus var. foliosus Raf. [superfluous autonym]

Taxonomic and Nomenclatural Links

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General References