Burke: Potentilla newberryi vs. Potentilla argentea

	Potentilla newberryi	Potentilla argentea
	Newberry's cinquefoil	hoary cinquefoil, silver cinquefoil
Habit		Herbaceous perennial from a woody base, the numerous stems 1.5-3 dm. tall, covered with a gray pubescence.
Leaves		Leaves mainly cauline, 5-10 per stem, palmately divided, the leaflets 5, 1-2 cm. long, oblanceolate, with coarse serrate teeth over half way to the mid-vein; stipules lanceolate, entire, 4-8 mm. long.
Flowers		Inflorescence open, branched, many-flowered, leafy-bracteate; calyx 4-6 mm. broad, silky, the 5 lobes ovate-lanceolate, 2-3 mm. long, alternating with linear, shorter bracteoles; petals 5, yellow, obovate with a wedge-shaped base, equaling the sepals; stamens 20; pistils numerous, the styles thickened and glandular at the base, tapered upward, attached to the end of the achene.
Fruits		Achene 0.6-0.8 mm. long, the same length as the style.

	Potentilla newberryi	Potentilla argentea
Flowering time	April-May	June-July
Habitat	Vernal pools, shores, and mudflats.	Sandy or gravely soil, typically where disturbed.
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 in Washington; British Columbia to Oregon, east across the northern U.S. and Canada to the Atlantic Coast. [WildflowerSearch map] [BONAP county map]
Origin	Native	Introduced from Eurasia
Conservation status	Historical in Washington (WANHP)	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. nivea, P. norvegica, P. pensylvanica, P. recta, P. rivalis, P. supina, P. villosa	P. anserina, 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: 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 newberryi

Potentilla argentea

Newberry's cinquefoil

hoary cinquefoil, silver cinquefoil

Habit

Herbaceous perennial from a woody base, the numerous stems 1.5-3 dm. tall, covered with a gray pubescence.

Leaves

Leaves mainly cauline, 5-10 per stem, palmately divided, the leaflets 5, 1-2 cm. long, oblanceolate, with coarse serrate teeth over half way to the mid-vein;

stipules lanceolate, entire, 4-8 mm. long.

Flowers

Inflorescence open, branched, many-flowered, leafy-bracteate;

calyx 4-6 mm. broad, silky, the 5 lobes ovate-lanceolate, 2-3 mm. long, alternating with linear, shorter bracteoles;

petals 5, yellow, obovate with a wedge-shaped base, equaling the sepals;

stamens 20;

pistils numerous, the styles thickened and glandular at the base, tapered upward, attached to the end of the achene.

Fruits

Achene 0.6-0.8 mm. long, the same length as the style.

Potentilla newberryi

Potentilla argentea

Flowering time

April-May

June-July

Habitat

Vernal pools, shores, and mudflats.

Sandy or gravely soil, typically where disturbed.

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]