Potamogeton richardsonii (Benn.) Rydb.
Richardson's pondweed
Potamogetonaceae (Horned pondweed family)
Introduction to Vascular Plants
Richardson's pondweed
Potamogetonaceae (Horned pondweed family)
Introduction to Vascular Plants
Species Information
General:
Perennial aquatic herb from strong rhizomes; stems up to 150 cm long, branched.
Leaves:
All submersed, triangular-lanceolate, thin, flat, dark green, 3-10 cm long, 1-3 cm wide, the tips blunt, clasping the stem, the stipules 1-3 cm long, coarse, disintegrating into persistent whitish fibres that remain even on old plants, fibrous or stringy; floating leaves absent.
Flowers:
Inflorescence spikelike, the spikes 1-4 cm long, with 6 to 12 whorls of flowers, the stalks inflated, club-shaped, 1.5-25 cm long.
Fruits:
Achenes, widely egg-shaped or almost rounded, 2.5-3 mm long, 2.3-2.7 mm wide, the beaks prominent, triangular, the keels absent.
Notes:
Stem anatomical characters interlacunar bundles and subepidermal bundles absent, pseudohypodermis 1 cell thick, endodermis of O-cells.
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 Potamogeton richardsonii
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) |
782 | 667 | 1117 |
| 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 |
C | ||
| #
of field plots species was recorded in: |
21 | ||
| Modal
BEC Zone Class |
SBS | ||
|
All BEC Zones (# of stations/zone) species was recorded in |
SBPS(5), SBS(16) | ||
|
Source:
Klinkenberg 2013
|
|||
Habitat and Range
Lakes, ponds and sloughs in the lowland, steppe and montane zones; common throughout BC; amphiberingian, N to AK, YT and NT, E to PQ, NB and NS and S to to ME, MA, PA, OH, IN, IL, IA, NE, CO, AZ and CA; E Asia.Status Information
Synonyms
Synonyms and Alternate Names:
Potamogeton perfoliatus subsp. richardsonii (Benn.) HultTn
Potamogeton perfoliatus var. richardsonii Benn.