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

Sparganium fluctuans (Engelm. ex Morong) B.L. Rob.
water bur-reed (floating bur-reed)
Sparganiaceae (Bur-reed family)

Introduction to Vascular Plants

© Ryan Batten  Email the photographer   (Photo ID #66807)

E-Flora BC Static Map
Distribution of Sparganium fluctuans
Click here to view the full interactive map and legend
Details about map content are available here
Click on the map dots to view record details.

Species Information

Click on the image below to view an expanded illustration for this species.



General:
Perennial, aquatic herb from long rhizomes; stems usually submerged, 80-150 cm tall.
Leaves:
Alternate, limp, unkeeled, usually floating, linear, ribbon-like, 60-100 cm long, 3-11 mm wide.
Flowers:
Inflorescence branched, of 2 to 4 female heads below and 1 to 6 male heads above, the heads globe-shaped, unstalked, the female heads 1.5-2.3 cm wide, axillary and subtended by conspicuous leaflike bracts; perianth segments 6, spoonlike, often with a dark spot at the tips, attached near the base of the flower stalk; stigma 1; anthers about 0.4-0.8 mm long.
Fruits:
Achenes, 2-5 mm long, unstalked, more or less constricted at the middle, beaked, the beaks 2-3.5 mm long, curved; seeds 1.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Ponds, lakeshores and slow-moving streams in the lowland and montane zones; rare in BC south of 55 degrees N; circumpolar, E disjunctly to NF and S to ME, MA, PA, MI, WI, MN, ID and WA; Eurasia.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Sparganium fluctuans

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)
Slope Gradient (%)
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
0
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
Modal Nutrient Regime
Class
Number of field plots
 species was recorded in:
1
Modal BEC Zone Class
CWH
All BEC Zones (# of stations/zone) species was recorded in: CWH(1)

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 montane boreal & cool temperate.

Synonyms and Alternate Names

Sparganium androcladum var. fluctuans Engelm. ex Morong

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References