Draba oligosperma

Draba oligosperma

General: tufted, mat-forming, usually somewhat gray-hairy perennial. Stems many, leafless, 1-10 cm tall, short-hairy throughout to hairless above. Leaves: basal, tufted, partly overlapping, linear to linear-spatulate, 3-12 mm long and 0.75-1.75 mm broad, the mid-nerve and edges usually thickened, the lower surface, and often also to some extent the upper surface and the edges, covered with flat, doubly comb-like-branched hairs, the long axis of the hairs mostly paralleling the midnerve of the leaf. Flowers: about 3 to 15 in dense top clusters. Flower stalks 3-10 mm long. The 4 sepals somewhat cupped, greenish with yellowish edges, 2-3 mm long. The 4 petals 3-5 mm long, yellow to off-white, fading with age. May-July. Fruits: pods, ovate or oval to elliptic or oblong-obovate, 2.5-8 mm long, 2-4 mm broad, plane or somewhat inflated, hairless to copiously short-hairy with simple, 2-branched or comb-like-branched hairs. Style 0.1-1 mm long. Seeds 2-10, 1.4-1.8 mm long. Distribution: Widespread on rocky ridges and montane slopes, often down to the foothills and valleys, in w. and c. parts of MT. Also in much of the Rocky Mts in w. Canada and U.S.

Draba oligosperma

General: tufted, mat-forming, usually somewhat gray-hairy perennial. Stems many, leafless, 1-10 cm tall, short-hairy throughout to hairless above. Leaves: basal, tufted, partly overlapping, linear to linear-spatulate, 3-12 mm long and 0.75-1.75 mm broad, the mid-nerve and edges usually thickened, the lower surface, and often also to some extent the upper surface and the edges, covered with flat, doubly comb-like-branched hairs, the long axis of the hairs mostly paralleling the midnerve of the leaf. Flowers: about 3 to 15 in dense top clusters. Flower stalks 3-10 mm long. The 4 sepals somewhat cupped, greenish with yellowish edges, 2-3 mm long. The 4 petals 3-5 mm long, yellow to off-white, fading with age. May-July. Fruits: pods, ovate or oval to elliptic or oblong-obovate, 2.5-8 mm long, 2-4 mm broad, plane or somewhat inflated, hairless to copiously short-hairy with simple, 2-branched or comb-like-branched hairs. Style 0.1-1 mm long. Seeds 2-10, 1.4-1.8 mm long. Distribution: Widespread on rocky ridges and montane slopes, often down to the foothills and valleys, in w. and c. parts of MT. Also in much of the Rocky Mts in w. Canada and U.S.