Tunturilapinvuokko

Dryas octopetala I,. Sp. PL 501. 1753
Geum chamaedry folium Crantz, Stirp. Austr. 1: 7. 1763.
Dryas chamaedryoides Pallas, Reise 3: 733. 1776.
Dryas alpina Salisb. Prodr. 363. 1796.
Dryas chamaedri folia S. F. Gray, Nat. Arr. Brit. PI. 2: 578. 1821.
Dryas octopetala minor Hook. Trans. Linn. Soc. 14: 387. 1824.
Ptilotum octopetalum Dulac, Fl. Hautes-Pyr. 313. 1867.
Dryas octopetala argentea Blytt, Norges Fl. 1176. 1876.
Dryadea octopetala Kuntze, Rev. Gen. 215. 1891.
Dryas octopetala hirsuta Hartz, Medd. Gr0nland 18: 319. 1895.
Densely cespitose perennial, with a woody matted caudex; petioles 5-20 mm. long; blades oblong, elliptic or oval, white-tomentose beneath, glabrate and dull or rarely tomentose (var. argentea) above, strongly veined and impressed on the veins above, therefore becoming very rugose, 6-25 mm. long, rounded or obtuse at both ends, or subcordate at the base, strongly crenate with rounded teeth; scape 5-20 cm. long, tomentose and more or less black-hairy; hypanthium black-hairy and tomentose; sepals linear or linear-lanceolate, 5-7 mm. long; petals white, elliptic or obovate-elliptic, 1-1.5 cm. long; achenes fusiform, about 4 mm. long; styles in fruit 2.5-3 cm. long.
Type locality: Lapland.
Distribution: East Greenland; Arctic British America and Alaska, southward in the mountains to Colorado; also arctic and alpine Europe and Asia.