Burke: Potentilla newberryi vs. Potentilla nivea

	Potentilla newberryi	Potentilla nivea
	Newberry's cinquefoil	snow cinquefoil
Habit		Grayish-woolly perennial from a branched crown and short rhizomes, the stems 3-15 cm. tall.
Leaves		Leaves basal, ternate, the leaflets oblong-obovate to oval, with 7-11 teeth halfway to the mid-vein.
Flowers		Inflorescence from contracted and 1- to 2-flowered to open and 3- to 9 flowered, bracteate; calyx silky, saucer-shaped, 8-12 mm. broad, the 5 lobes lanceolate, 3-4 mm. long, alternating with smaller, linear bracteoles; petals 5, yellow, obcordate, 1-2 mm. longer than the sepals; stamens 20; pistils numerous, style sub-terminal.
Fruits		Achene 1-1.5 mm. long, nearly smooth.

	Potentilla newberryi	Potentilla nivea
Flowering time	April-May	June August
Habitat	Vernal pools, shores, and mudflats.	Arctic tundra and gravel bars to alpine slopes and meadows.
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]	Occurring on both sides of the Cascades crest in northern Washington; Alaska to Washington, east to the southern Rocky Mountains to Colorado, further east to eastern North America. [WildflowerSearch map] [BONAP county map]
Origin	Native	Native
Conservation status	Historical in Washington (WANHP)	Sensitive in Washington (WANHP)
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. anserina, P. argentea, P. biennis, P. breweri, P. drummondii, P. flabellifolia, P. glaucophylla, P. gracilis, P. hyparctica, P. jepsonii, P. newberryi, P. norvegica, P. pensylvanica, P. recta, P. rivalis, P. supina, P. villosa
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, OR, WA Local Web sites: 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 nivea

Newberry's cinquefoil

snow cinquefoil

Habit

Grayish-woolly perennial from a branched crown and short rhizomes, the stems 3-15 cm. tall.

Leaves

Leaves basal, ternate, the leaflets oblong-obovate to oval, with 7-11 teeth halfway to the mid-vein.

Flowers

Inflorescence from contracted and 1- to 2-flowered to open and 3- to 9 flowered, bracteate;

calyx silky, saucer-shaped, 8-12 mm. broad, the 5 lobes lanceolate, 3-4 mm. long, alternating with smaller, linear bracteoles;

petals 5, yellow, obcordate, 1-2 mm. longer than the sepals;

stamens 20;

pistils numerous, style sub-terminal.

Fruits

Achene 1-1.5 mm. long, nearly smooth.

Potentilla newberryi

Potentilla nivea

Flowering time

April-May

June August

Habitat

Vernal pools, shores, and mudflats.

Arctic tundra and gravel bars to alpine slopes and meadows.

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]

Occurring on both sides of the Cascades crest in northern Washington; Alaska to Washington, east to the southern Rocky Mountains to Colorado, further east to eastern North America.

[WildflowerSearch map]

[BONAP county map]

Origin

Native

Conservation status

Historical in Washington (WANHP)

Sensitive in Washington (WANHP)

Sibling taxa