UW Burke Herbarium species comparison

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Potentilla breweri

Potentilla norvegica

Brewer's cinquefoil

Norwegian cinquefoil, rough 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. 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

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.

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 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 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

Achene smooth, greenish, 1.3 mm. long.

Achenes light brown, 1.0-1.3 mm. long ovate, flattened.

Potentilla breweri

Potentilla norvegica
Flowering time June-August May-August
Habitat Moist meadows and stream banks to open slopes at middle to high elevations. Usually in moist soil, often along irrigation ditches or in waste places.
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 across North America to the Atlantic Coast.
[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. 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
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Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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