Stem 75--95 cm tall, glabrous or sparsely hispidulous proximally, simple or 1-branched distally. Leaf blade 14--18 cm wide, base cordate; primary lobes separate for at least 60% of blade radius; central lobe rhombic, 3-lobulate, distally few lobulate and dentate, apex acute; ultimate lobules narrowly ovate; proximal leaves usually withered. Raceme 20--40 cm, ca. 6-flowered, retrorsely puberulent and yellow glandular puberulent; proximal bracts leaflike, distal ones lanceolate. Pedicels 5--9 cm; bracteoles distal, narrowly linear or filiform, 4--10 mm. Sepals blue, adaxially sparsely puberulent; spur cylindric-subulate, 1.3--1.4 cm, base ca. 3.5 mm in diam.; other sepals 1.9--2.1 cm. Petals 2-lobed, glabrous. Staminode limb ovate, 2-parted, yellowish barbate. Filaments glabrous. Carpels 3, glabrous. Fl. Aug.
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