Burke: Potentilla newberryi vs. Potentilla anserina

	Potentilla newberryi	Potentilla anserina
	Newberry's cinquefoil	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 newberryi	Potentilla anserina
Flowering time	April-May	April-October
Habitat	Vernal pools, shores, and mudflats.	Wet, alkaline areas from coast to arid inlands.
Distribution	Known historically (1898) from the Columbia River Gorge in Washington, now likely extirpated; central Oregon to California, east to northwestern Nevada. [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	Native
Conservation status	Historical in Washington (WANHP)	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. 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	Local floras: CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Potentilla newberryi

Potentilla anserina

Newberry's cinquefoil

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 newberryi

Potentilla anserina

Flowering time

April-May

April-October

Habitat

Vernal pools, shores, and mudflats.

Wet, alkaline areas from coast to arid inlands.

Distribution

Known historically (1898) from the Columbia River Gorge in Washington, now likely extirpated; central Oregon to California, east to northwestern Nevada.

[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

Historical in Washington (WANHP)

Not of concern

Sibling taxa