Burke: Potentilla newberryi vs. Potentilla breweri

	Potentilla newberryi	Potentilla breweri
	Newberry's cinquefoil	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 newberryi	Potentilla breweri
Flowering time	April-May	June-August
Habitat	Vernal pools, shores, and mudflats.	Moist meadows and stream banks to open slopes at middle to high elevations.
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 east of the Cascades crest from central Washington south; central Washington to California, east to Nevada. [WildflowerSearch map] [BONAP county map]
Origin	Native	Native
Conservation status	Historical in Washington (WANHP)	Threatened 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. 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, 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 breweri

Newberry's cinquefoil

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 newberryi

Potentilla breweri

Flowering time

April-May

June-August

Habitat

Vernal pools, shores, and mudflats.

Moist meadows and stream banks to open slopes at middle to high elevations.

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]