Herbaceous perennial, 6-16 cm tall with several to many leaves and 1 to several peduncles arising from an often much-branched, woody root crown; leaves oblong in outline, blades 2.7-6 cm long, 2-3.5 cm wide, usually bipinnate, pinnae linear to ovate, 5-20 mm long, 1-4 mm wide, ultimate divisions linear to oblanceolate; peduncles 10.2-16 cm long, exceeding the leaves, glabrous to granulose at summit; bracts usually none; rays 6-8, about equal, spreading, 4-8 mm long; bractlets linear to narrowly elliptic, 2-5 mm long, distinct; pedicels 6-8, most 0.8-1.6 mm long; calyx-teeth linear to ovate or deltoid, 0.5-1 mm long; fruit oblong, 3.5-4.5 mm long, 1.7-2.5 mm wide, lateral and dorsal ribs prominently membranous-winged, wings to 1 mm tall, vittae 1 in intervals, 2 on commissure. Flowering May and June.