Herbs, annual, 30-45 cm tall. Stems slender, rarely branched, sparsely setose. Stipules ovate-lanceolate, ca. 3 mm. Leaves 2-or 4-foliolate; petiole ca. 1 mm; rachis 1-1.5 cm; leaflet blades oblong-oblanceolate, 1.5-2 × 0.6-0.7 cm, membranous, both surfaces glabrous, apex obtuse. Inflorescences shortly scorpioid cymes, with 5 or 6 flowers; peduncle upward spreading, 3-7 mm; bracts ovate-lanceolate. Bracteoles linear, 1/4-1/3 as long as calyx, membranous. Calyx 1-1.2 cm, membranous, dry, almost glabrous, with reticulate veins, abaxial lip apex acute, adaxial lip longer and apex acute to slightly emarginate. Corolla yellow, ca. 1.5 × as long as calyx. Stamens diadelphous. Ovary with a short stipe. Legume a plicate loment, shortly stipitate, divided into 10-12 articles; articles globose, outside smooth or papillate. Seeds not seen. Fl. and fr. Aug-Oct.
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