Potentilla egedii Wormsk.
coast silverweed
Rosaceae (Rose family)
Introduction to Vascular Plants
coast silverweed
Rosaceae (Rose family)
Introduction to Vascular Plants
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Species Information
General:
Perennial herb from a long, strawberry-like stolon or runner, rooting and producing leaf-clusters at the nodes, smooth to sparsely appressed-silky on the stolons.
Leaves:
All basal, tufted, 10-40 cm long, stalked, ascending, pinnately compound; 7 to 21 main leaflets 0.5-5 cm long, interspersed with smaller ones, oblong to egg-shaped, coarsely saw-toothed, green and smooth to sparsely hairy above, silvery-silky only on the veins and white-woolly beneath, the leaf-stalks smooth to sparsely hairy.
Flowers:
Inflorescence of single flowers on long naked stalks from the leafy nodes of the stolons, the stalks 5-25 cm long; corollas yellow, bowl-shaped, the petals 5, oval-oblong, 8-16 mm long; calyces silky and woolly, 5-lobed, the lobes egg-shaped, 3-10 mm long, enlarging and becoming erect in fruit, alternating with 5 shorter, sometimes toothed bractlets; ovaries superior; stamens 25 to 30.
Fruits:
Achenes, numerous, plumply egg-shaped, about 2 mm long, rounded and smooth to obscurely wrinkled on the back.
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 Potentilla egedii
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) |
17 | 0 | 560 |
| Slope
Gradient (%) |
1 | 0 | 25 |
|
Aspect (degrees) |
258 | 150 | 360 |
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
5 | 2 | 8 |
| Modal
Nutrient Regime
Class |
D | ||
| #
of field plots species was recorded in: |
101 | ||
| Modal
BEC Zone Class |
CWH | ||
|
All BEC Zones (# of stations/zone) species was recorded in |
CDF(47), CWH(51), IDF(3) | ||
|
Source:
Klinkenberg 2013
|
|||
Habitat and Range
Wet tidal marshes, estuarine meadows, brackish streambanks and moist beaches in the lowland zone; common along the coast in BC, N to AK and S to CA.Synonyms
Synonyms and Alternate Names:
Argentina egedii subsp. egedii (Wormsk.) Rydb.