Potentilla pennsylvanica

Potentilla pennsylvanica Iy. Mant. 76. 1767
Potentilla missourica Horn em. ; Lindl. Bot. Reg. 17 : pi. 1412. 1831.
? Potentilla missourica Schrad. Ind. Sem. Hort. Goetting. 1832 ; I^innaea 8 : Iitt. 26. 1833.
Potentilla Pennsylvania communis T. & G. Fl. N. Am. 1 : 438. 1840.
Potentilla pennsylvanica missourica I^ehm. Stirp. Pug. 9: 41. 1851.
Perennial; st»em generally erect, strict, 4-8 dm. high, more or less appressed-pubescent and tomentulose ; stipules ovate in outline, 1-2 cm. long, often pectinately divided ; leaves pinnate with 7-15 leaflets, grayish-tomentose and veiny beneath, shortstrigose and green above, the lower long-petioled, the upper subsessile ; leaflets gradually reduced downward, often somewhat decurrent on the rachis, oblong or oblanceolate in outline, divided halfway to the midrib into oblong divisions, the margins scarcely at all revolute ; cyme dense, with erect branches; flowers short-pedicelled ; hypanthium densely pubescent, tomentose and strigose ; bractlets lanceolate, acute, equaling the ovate-triangular acute sepals, usually not prominently veiny, about 5 mm. long; petals obovate, cuneate, slightly emarginate or truncate, about 6 mm. long; stamens about 20; pistils numerous; styles thickened and glandular below.
Type locality : Canada.
Distribution : On the plains, from Hudson Bay to the Yukon Territory and Colorado.