Sparganium emersum Rehmann
emersed bur-reed (European bur-reed)
Sparganiaceae (Bur-reed family)
Introduction to Vascular Plants
emersed bur-reed (European bur-reed)
Sparganiaceae (Bur-reed family)
Introduction to Vascular Plants
Species Information
General:
Perennial, aquatic herb from long rhizomes; stems erect, emersed (occasionally floating), 30-40 cm tall.
Leaves:
Alternate, erect, emersed (occasionally floating), keeled and triangular in cross-section, linear with sheathing bases, 70-85 (100) cm long, 2-12 mm wide.
Flowers:
Inflorescence simple, of 2 to 4 female heads below and 2 to 5 (8) male heads above, the heads globe-shaped, the female heads 1-2 cm wide, at least some borne above the leaf axils and subtended by conspicuous leaflike bracts; perianth segments 6, scalelike, attached near the top of the flower stalk; stigma 1; anthers about 1 mm long, 0.5 mm wide.
Fruits:
Achenes, 2-4.5 mm long, constricted at the middle, achenes greenish at base prior to drying, beaked, the beaks 3-4 mm long, straight or slightly curved, the stalks 1-1.5 mm long; seeds 1.
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
Ecology
Ecological Framework for Sparganium emersum
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)
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 |
||
|
Avg |
Min |
Max |
|
| Elevation
(metres) |
845 | 20 | 1250 |
| Slope
Gradient (%) |
0 | 0 | 0 |
|
Aspect (degrees) |
0 | ||
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
7 | 7 | 8 |
| Modal
Nutrient Regime
Class |
D | ||
| #
of field plots species was recorded in: |
18 | ||
| Modal
BEC Zone Class |
CWH | ||
|
All BEC Zones (# of stations/zone) species was recorded in |
CWH(7), IDF(4), SBPS(1) | ||
|
Source:
Klinkenberg 2013
|
|||
Habitat and Range
Ponds, ditches and lakeshores in the lowland, steppe and montane zones; common throughout BC; circumpolar, N to AK, YT and NT, E to NF and S to ME, MA, NY, PA, VA, IN, MN, SD, NM, AZ and CA; Greenland, Europe.Status Information
Synonyms
Synonyms and Alternate Names:
Sparganium acaule (Beeby ex Macoun) Rydb.
Sparganium angustifolium subsp. emersum
Sparganium angustifolium subsp. emersum
Sparganium chlorocarpum Rydb.
Sparganium chlorocarpum var. acaule (Beeby ex Macoun) Fern.
Sparganium emersum subsp. emersum Rehmann
Sparganium emersum var. emersum
Sparganium simplex Huds.