Herbs perennial, 30-100 cm high. Thick root, deep soil layer, root neck developed. Stem erect, fascicled to recumbent, quadrangular, glabrous or slightly pilose, leafy. Pinnatifid triple compound leaves; Stipules large, ovate-lanceolate, apex acute, base entire or with 1-2 teeth cleft, veins distinct; Petiole shorter than lobule; Lobules ovate, long long ovate to ovate, linear, etc, or lobular slightly larger, long (5) 10 to 25 to 40 mm, 3 -- 10 mm wide, papery, apex obtuse, out by the midrib long tooth, base narrow, cuneate, edge more than one-third of the sawtooth, glabrous above, dark green, posted below fu pilose, lateral veins 8-10 on, with midrib into acute, slightly close at the leaf edge split ends; Terminal petioles were slightly longer than lateral petioles. Inflorescence racemose or capitate, 1-2.5 cm long, with 5-30 flowers; Total pedicel erect, longer than leaf; Bracts linearly tapered longer or equal in length than pedicels; Flowers 6-12 mm long; Pedicels short, ca. 2 mm long; Calyx campanulate, 3-5 mm long, calyx teeth linear-conical, longer than calyx tube, appressed pilose; Corolla of various colors: pale yellow, dark blue to dark purple, petals with long petiole, flag oblong, apex slightly concave, significantly longer than the wing and keel, wing flap slightly longer than the keel; Ovary linear, pilose, style short broad, upper apiculate, stigma punctate, ovules numerous. Pods helical tightly coiled 2-4 (-6) circlet, central or subporous, 5-9 mm, pilose or deciduous, veins fine, unclear, brown when ripe; There are 10 to 20 seeds. Seeds ovate, 1-2.5 mm long, smooth, yellow or brown. Flowering may to July and fruiting June to August.
