Potentilla pensylvanica var. litoralis (Rydb.) Boivin

Potentilla pectinata Raf. Aut. Bot. 164. 1840
Potentilla pennsylvanica A. Gray, Man. 122. 1848. Not P. pennsylvanica L> 1767. Potentilla litoralis Rydb. Bull. Torrey Club 23 : 264. 1896.
Perennial, with a short cespitose caudex ; stem decumbent or ascending, 2-4 dm. long^ simple, slightly appressed silky-strigose ; lower stipules lanceolate, scarious and brown, the upper ovate, green, more or less toothed; leaves pinnate, with 5 approximate leaflets, the lower pair the smaller, or subdigitately 5-foliolate, grayish-tomentose and veiny beneath, nearly glabrous above ; leaflets obovate, divided to near the midrib into linear-oblong obtuse divisions ; hypanthium strigose and slightly tomentose, in fruit about 8 mm. in diameter; bractlets lanceolate-oblong, about 4-5 mm. long ; sepals ovate-triangular, ■acuminate, 5-6 mm. long; petals obovate, cuneate, truncate or slightly emarginate, about equaling the calyx ; stamens 20-25 ; styles short, terminal, thickened and glandular at the base ; achenes smooth, numerous.
Type locality : Canada.
Distribution : Sandy or rocky shores, Newfoundland and Labrador* to New Hampshire and Quebec ; also on Hudson Bay.