Pretty Cinquefoil

Potentilla sommerfeltii Lehm. Delect. Sem. Hort
Hamb. 1849 : 6. 1849.
Cespitose perennial ; caudex covered with the brown scarious broadly ovate stipules ; stem 3-5 cm. high, slightly silky, scapose, 1or 2-flowered ; leaves pinnate, with 5 leaflets, the terminal one stalked, glabrate above, finely tomentose beneath ; leaflets obovate in outline, divided to near the midrib into linear-oblong obtuse segments ; bractlets oblong, obtuse, much shorter than the similar sepals, which are about 3 mm. long ; petals obovate-cuneate, slightly emarginate, about 5 mm. long ; stamens about 20 ; pistils many ; styles short, slightly thickened and glandular at the base.
Type locality : Greenland.
Distribution : Spitzbergen, Greenland, and arctic coast of North America.