UW Burke Herbarium species comparison

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Potentilla subviscosa

Potentilla anserina

silverweed cinquefoil, common silverweed
Habit Grayish, silky-woolly perennial, widely spreading by long, prostrate, freely-rooting stolons; stipules prominent, those of the stolons sheathing and deeply linear-lobed.
Leaves

Leaf blades whitish silky-woolly on both surfaces or greenish above, 1-3 dm. long, pinnate;

leaflets 15-25, obovate to oblong, rounded, sharply and coarsely serrate, 1-3.5 cm. long, interspersed with much smaller, entire leaflets.
Flowers

Flowers solitary on the nodes of the stolons on peduncles 3-10 cm. long;

calyx silky, shallowly bowl-shaped, the 5 lobes ovate-triangular, 4-6 mm. long, spreading at blooming but erect an up to 12 mm. long in fruit;

petals yellow, oval, 8-12 mm. long, rounded;

stamens 20-25;

pistils numerous;

style slender, smooth, mid-laterally attached to the ovary.
Fruits

Achenes light brow, obliquely ovoid, 2 mm. long.

Potentilla subviscosa

Potentilla anserina
Flowering time April-October
Habitat Wet, alkaline areas from coast to arid inlands.
Distribution
[WildflowerSearch map]
[BONAP county map]
Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains, Great Plains, Great Lakes region, and northeastern North America.
[WildflowerSearch map]
[BONAP county map]
Origin Native
Conservation status Not of concern
Sibling taxa
P. anserina, P. argentea, P. biennis, P. breweri, P. drummondii, P. flabellifolia, P. glaucophylla, P. gracilis, P. hyparctica, P. jepsonii, P. newberryi, P. nivea, P. norvegica, P. pensylvanica, P. recta, P. rivalis, P. supina, P. villosa
P. argentea, P. biennis, P. breweri, P. drummondii, P. flabellifolia, P. glaucophylla, P. gracilis, P. hyparctica, P. jepsonii, P. newberryi, P. nivea, P. norvegica, P. pensylvanica, P. recta, P. rivalis, P. supina, P. villosa
Subordinate taxa
P. anserina ssp. anserina, P. anserina ssp. pacifica
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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