Creeping Sibbaldia

Sibbaldia procumbens I,. Sp. PI. 284. 1753
Poieniilla procumbens Clairv. Man. 166. 1811. Not P. procumbens Sibth. 1794.
Densely cespitose, or with numerous creeping scaly rootstocks ; flowering stems less than 1 dm. high, more or less hirsute-strigose, few-leaved ; stipules triangular-obovate to lanceolate ; basal leaves on slender petioles, ternate, sparingly appressed-pilose ; leaflets 1-2 cm. long, broadly cuneate, 3-5~toothed at the apex ; stem-leaves similar but shortpetioled ; flowers few in rather dense cymes ; hypanthium 3-4 mm. in diameter, somewhat pilose ; bractlets and sepals subequal, broadly oblong or ovate ; petals yellow, spatulate, shorter than the sepals.
Type locality : Lapland.
Distribution : Arctic and alpine regions of America from Greenland to Alaska and south in the mountains to New Hampshire, Colorado, and California ; also in arctic and alpine Europe and