Burke: Potentilla breweri vs. Potentilla drummondii

	Potentilla breweri	Potentilla drummondii
	Brewer's cinquefoil	Drummond'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.	Eglandular perennial from a branched base and short, thick rhizomes, the flowering stems 2.5-4.5 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.	Basal leaves pinnate, the leaflets 5-9, closely crowded, obovate, 2-5 cm. long, the upper 3 somewhat confluent, all cleft about midway to the mid-vein into linear or lanceolate teeth; stipules 1-2 cm. long, ovate, entire; cauline leaves few, much 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.	Inflorescence open, many-flowered; calyx saucer-shaped, up to 1.5 cm. wide in fruit, the 5 ovate lobes slightly longer than the alternating lanceolate bracteoles; petals 5, yellow, obovate, 6-11 mm. long; stamens 20; pistils numerous, style slender, sub-terminal, longer than the achene.
Fruits	Achene smooth, greenish, 1.3 mm. long.	Achene 1.5 mm. long.

	Potentilla breweri	Potentilla drummondii
Flowering time	June-August	June-August
Habitat	Moist meadows and stream banks to open slopes at middle to high elevations.	Forest openings, meadows and high ridges, middle to high elevations in the mountains.
Distribution	Occurring east of the Cascades crest from central Washington south; central Washington to California, east to Nevada. [WildflowerSearch map] [BONAP county map]	Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to Alberta, Idaho, and Montana. [WildflowerSearch map] [BONAP county map]
Origin	Native	Native
Conservation status	Threatened in Washington (WANHP)	Not of concern
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. 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: 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 breweri

Potentilla drummondii

Brewer's cinquefoil

Drummond'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.

Eglandular perennial from a branched base and short, thick rhizomes, the flowering stems 2.5-4.5 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.

Basal leaves pinnate, the leaflets 5-9, closely crowded, obovate, 2-5 cm. long, the upper 3 somewhat confluent, all cleft about midway to the mid-vein into linear or lanceolate teeth;

stipules 1-2 cm. long, ovate, entire;

cauline leaves few, much 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.

Inflorescence open, many-flowered;

calyx saucer-shaped, up to 1.5 cm. wide in fruit, the 5 ovate lobes slightly longer than the alternating lanceolate bracteoles;

petals 5, yellow, obovate, 6-11 mm. long;