Burke: Potentilla bipinnatifida vs. Potentilla norvegica

	Potentilla bipinnatifida	Potentilla norvegica
		Norwegian cinquefoil, rough cinquefoil
Habit		Taprooted annual or perennial, the stems erect to ascending, 3-6 dm. tall, simple to branching, often floriferous for much of its length, stiff-hairy below to sub-woolly above, not glandular.
Leaves		Leaves alternate, mainly cauline; stipules well-developed, ovate, usually strongly toothed; leaflets usually 3, broadly ovate to obovate below to narrowly oblong above, 3-6 cm. long, serrate with rounded teeth, pubescent.
Flowers		Inflorescence a rather compact cyme with a long peduncle; calyx 7-11 mm. broad, the 5 sepals broadly lanceolate, erect, the 5 bracteoles lanceolate and about equal in length to the sepals; petals yellow, broadly obovate, slightly shorter than the sepals; stamens usually 20; pistils numerous; style terminal, thickened basally.
Fruits		Achenes light brown, 1.0-1.3 mm. long ovate, flattened.

	Potentilla bipinnatifida	Potentilla norvegica
Flowering time		May-August
Habitat		Usually in moist soil, often along irrigation ditches or in waste places.
Distribution	[WildflowerSearch map] [BONAP county map]	Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast. [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. anserina, P. argentea, P. biennis, P. breweri, P. drummondii, P. flabellifolia, P. glaucophylla, P. gracilis, P. hyparctica, P. jepsonii, P. newberryi, P. nivea, P. pensylvanica, P. recta, P. rivalis, P. supina, P. villosa
Web links	Local floras: BC 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	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 bipinnatifida

Potentilla norvegica

Norwegian cinquefoil, rough cinquefoil

Habit

Taprooted annual or perennial, the stems erect to ascending, 3-6 dm. tall, simple to branching, often floriferous for much of its length, stiff-hairy below to sub-woolly above, not glandular.

Leaves

Leaves alternate, mainly cauline;

stipules well-developed, ovate, usually strongly toothed;

leaflets usually 3, broadly ovate to obovate below to narrowly oblong above, 3-6 cm. long, serrate with rounded teeth, pubescent.

Flowers

Inflorescence a rather compact cyme with a long peduncle;

calyx 7-11 mm. broad, the 5 sepals broadly lanceolate, erect, the 5 bracteoles lanceolate and about equal in length to the sepals;

petals yellow, broadly obovate, slightly shorter than the sepals;

stamens usually 20;

pistils numerous;

style terminal, thickened basally.

Fruits