Stem 45--130 cm, glabrous or proximally with short, rigid hairs, usually branched. Leaf blade 6--10 cm wide, base deeply cordate; primary lobes separate for at least 90% of blade radius; central lobe rhombic, 3-cleft, distally few lobulate, apex acute; ultimate lobules triangular, narrowly so, narrowly lanceolate or lanceolate-linear; proximal leaves withered. Raceme 6--15(--30) cm, 6--12(--17)-flowered; rachis glabrous; proximal bracts 3-parted or undivided, distal ones undivided, linear-subulate. Pedicels 2--7 cm, glabrous or puberulent apically; bracteoles borne near middle of pedicel or distally, subulate, 4.5--9 mm, glabrous or sparsely puberulent. Sepals purple-blue, abaxially appressed puberulent, rarely abaxially hirsute, shortly corniculate distally; spur subulate or rarely cylindric-subulate, 1.3--2.4(--2.6) cm, nearly equaling or 1.5--2 × as long as lateral and lower sepals, slightly recurved, base 2--3(--5) mm in diam.; other sepals 1--1.5(--2.5) cm. Petals distally 2-lobulate, glabrous or sparsely ciliate. Staminode limb 2-lobed, sometimes emarginate or 2-parted, yellow barbate. Filaments glabrous. Carpels 3; ovaries glabrous or puberulent. Fl. Aug--Nov.
Can be grown by cuttings. Seeds needs stratification.
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