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

Potentilla egedii Wormsk.
coast silverweed
Rosaceae (Rose family)

Introduction to Vascular Plants

© Jim Riley  Email the photographer   (Photo ID #15424)

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Distribution of Potentilla egedii
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Species Information

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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.

Source: The Illustrated Flora of British Columbia

Habitat / 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.

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)

Site Information
Value / Class

Minimum

Average

Maximum

Elevation (metres) 0 17 560
Slope Gradient (%) 0 1 25
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
150 258 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
2 5 8
Modal Nutrient Regime
Class
D
Number 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)

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

Argentina egedii subsp. egedii

Taxonomic and Nomenclatural Links

Additional Photo Sources

Related Databases

General References