Burke: Potentilla breweri vs. Potentilla millefolia

	Potentilla breweri	Potentilla millefolia
	Brewer's cinquefoil
Habit	Perennial from a sparingly branched crown and often a short rhizome, grayish-sericeous but not glandular, the stems 1-2.5 dm. tall.
Leaves	Basal leaves pinnate, the leaflets 9-11, crowded, broadly obovate with a wedge-shaped base, 1-2 cm. long, cleft more that halfway to the midvein into linear divisions; stipules ovate, 0.5-1.5 cm. long; cauline leaves 2-3, greatly reduced.
Flowers	Inflorescence an open, several-flowered cyme; calyx sericeous, cup-shaped, up to 1.5 cm. broad in fruit, the 5 lobes lanceolate, interspersed with 5 linear, smaller bracteoles; petals 5, yellow, obcordate, exceeding the sepals; stamens 20; pistils numerous; style slender, sub-apical.
Fruits	Achene smooth, greenish, 1.3 mm. long.

	Potentilla breweri	Potentilla millefolia
Flowering time	June-August
Habitat	Moist meadows and stream banks to open slopes at middle to high elevations.
Distribution	Occurring east of the Cascades crest from central Washington south; central Washington to California, east to Nevada. [WildflowerSearch map] [BONAP county map]	[WildflowerSearch map] [BONAP county map]
Origin	Native
Conservation status	Threatened in Washington (WANHP)
Sibling taxa	P. anserina, P. argentea, P. biennis, 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. 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: 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

Potentilla breweri

Potentilla millefolia

Brewer's cinquefoil

Habit

Perennial from a sparingly branched crown and often a short rhizome, grayish-sericeous but not glandular, the stems 1-2.5 dm. tall.

Leaves

Basal leaves pinnate, the leaflets 9-11, crowded, broadly obovate with a wedge-shaped base, 1-2 cm. long, cleft more that halfway to the midvein into linear divisions;

stipules ovate, 0.5-1.5 cm. long;

cauline leaves 2-3, greatly reduced.

Flowers

Inflorescence an open, several-flowered cyme;

calyx sericeous, cup-shaped, up to 1.5 cm. broad in fruit, the 5 lobes lanceolate, interspersed with 5 linear, smaller bracteoles;

petals 5, yellow, obcordate, exceeding the sepals;

stamens 20;

pistils numerous;

style slender, sub-apical.

Fruits

Achene smooth, greenish, 1.3 mm. long.