Herbs perennial, to 120 cm tall. Stem strong, erect, branched, sparsely glandular, wingless. Leaves with simple or weakly branching tendril; stipules semisagittate, linear-lanceolate, 12-18 × 1.5-2 mm; leaflets 4-or 5-paired, ovate-lanceolate, 90-120 × 25-40 mm, glabrous, with 5 prominent veins, strongly caudate at apex. Raceme ca. 10 cm, many flowered. Calyx campanulate; teeth unequal, longest tooth ca. 7 mm. Corolla light yellow, 1.8-2 cm; standard orbicular, with claw; wings slightly shorter than keels. Ovary linear, glabrous, brown glandular. Legume linear, 6-8 cm, brown glandular. Seeds 8-12.
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