Japan Flora: Shrub with reddish brown, glabrous, elongate branches and needlelike slender prickles; stipules membranous, entire, glan­dular on margin, the free portion lanceolate to ovate, acute to acuminate; leaflets 5-7, membranous, oblong or ovate-oblong, 2-4 cm. long, acute to acuminate, vivid green, glabrous on up­per side, slightly whitish and with appressed-pubescencc on midrib beneath, the petioles sometimes glandular-pilose; flow­ers solitary, pink, 3-4 cm. across, the pedicels glandular-pilose, 3-5 cm. long; calyx with glabrous tube, the lobes elongate above, white-tomentose inside and on margin, sometimes glandular-pilose outside; fruit fusiform, 2-3 cm. long, 7-10 mm. across. June-July. High mountains.

Hokkaido, Hon­shu (n. and centr. distr.).  Siberia, Kamchatka, Sakhalin, Korea, and N. America (var.),

var. nipponensis (Crep.) Koehne. Stipules broader, the free portion elliptic-ovate, often obtuse; leaflets 7-9, obtuse to rounded, 1-3 cm. long, 8-15 mm. wide, with minute acute teeth; pedicels with rather long glandular hairs; fruit obovoid. June-July. High moun­tains; Honshu (centr. distr. and Oze), Shikoku.