Burke: Potentilla millefolia vs. Potentilla nivea

	Potentilla millefolia	Potentilla nivea
		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 millefolia	Potentilla nivea
Flowering time		June August
Habitat		Arctic tundra and gravel bars to alpine slopes and meadows.
Distribution	[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		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. newberryi, 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 Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria, Turner Photog. 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 millefolia

Potentilla nivea

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 millefolia

Potentilla nivea

Flowering time

June August

Habitat

Arctic tundra and gravel bars to alpine slopes and meadows.

Distribution

[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

Sensitive in Washington (WANHP)

Sibling taxa