Plants perennial. Stems 1 to few, erect, 50-100 cm tall, herbaceous, branched toward apex, pilose, spreading or retrorse tawny pilose. Stem leaves 1-pinnate, narrowly ovate, to 30 × 15-20 cm; petiole to 10 cm, densely pilose, ± clasping, petiolules short to ± absent; leaflets (3-)7, minutely hispid, hirsute on veins, margin crenate; terminal leaflet ovate to oblong-lanceolate, to 12 × 5 cm. Verticillasters 5-12-flowered, in terminal racemes; rachis densely glandular hirtellous; bracts sessile, lanceolate to narrowly ovate, 3-8 × 1-2 mm, minutely hispid, base cuneate, margin entire, apex acute. Pedicel 3-5 mm, purple. Calyx campanulate, 7-8 × ca. 5 mm in flower, 1-1.1 cm × 7 mm after anthesis, glandular pilose, white pilose annulate inside; upper lip triangular, reflexed; teeth of lower lip triangular. Corolla tawny, purplish or purple on upper lip 1.6-2.2 cm, glandular; tube obliquely pilose annulate inside; upper lip falcate, 0.9-1.1 cm; lower lip 6-9 mm, middle lobe obovate to subrhombic, ca. 2 × 3 mm, lobules lacerate-dentate; lateral lobes obliquely oblong, 2-4 mm, apex rounded. Filaments ca. 4 mm; upper arms ca. 1.3 cm; lower arms ca. 4 mm, sterile, apex united. Style filiform, much exserted. Nutlets yellow-brown, ± fusiform, triquetrous, apex acute, ca. 3 × 1-1.3 mm. Fl. Jun.
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