Potentina frigida, Vili. Potentina hyparctica, Malte

41. P. frigida Vili. , Hist. Pl. Dauph. 3: 563 (1788).

Like 40 but flowering stems up to 10 cm; indumentum much thicker, with sessile glandular and long, ±patent, eglandular hairs; leaflets hairy above, more deeply incise-dentate; petals slightly shorter to slightly longer than sepals. 2n= 28. Mountain grassland and rocks, usually above 2500 m; calcifuge. • Pyrenees, Alps. Au Ga He Hs It.

42. P. hyparctica Malte , Rhodora 36: 177 (1934)

(P. emarginata Pursh, non Desf.). Flowering stems up to 10 cm, lateral, ascending, sparsely hairy and sparsely to densely glandular. Leaves ternate; leaflets 5-15 mm, broadly obovate, with triangularoblong, acute or subobtuse teeth, sparsely hairy above, sparsely to densely hairy and often glandular beneath. Stipules of basal leaves ovate. Flowers 1-3. Epicalyx-segments elliptical or oblongelliptical, obtuse, a little shorter than the ovate sepals. Petals (4-5-)6-8 mm, yellow, about 1 | times as long as sepals. Style conical at base, slightly davate at apex. 2/i = 42. Arctic Europe. Rs (N) Sb Su. (Arctic America and W. Asia.)