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\nAnnual herbs, about 10-60 cm tall.<\/span> Stems erect, glabrous, nodes swollen. Leaves opposite or whorled near the shoots, ovate-elliptic, about 3-20 x 0.8-2-7.5 cm across, base cuneate, margins shallow serrate, apex acuminate, lateral veins about 6-19 on either side of the midrib, green finely pubescent above and paler whitish glabrous beneath, petiole slender, about 1-5 cm long, stipules filiform. Inflorescence resupinate, axillary in the upper parts of the plant, 1-5 flowered, peduncle short about 1-3 mm long. Flowers bisexual, zygomorphic, about 1.5-2.5 cm across, pedicel slender, about 1.3-2.3 cm long, sepals 3, imbricate, 2 lateral ones flat, small, linear lanceolate, apex acuminate, glabrous, about 3 mm long, posterior sepal (Lip) large, petaloid, beaked, about 1.2-1.5 cm long, spurred, spur curved, about 0.8 cm long, upper standard petal, semi cucullate, suborbicular, lateral ones (wings or alae), fused in pairs, about 1.6 cm long, basal lobes broadly elliptic, distal lobes slightly emarginated in inner margins, basal and distal lobes almost of the same size, dorsal auricle present, short globular. Stamens 5, anthers bi-locular. Ovary 5 locular. Fruit indehiscent, capsule, narrow fusiform or linear, about 1.5-2 cm long, slightly swollen in the middle, glabrous. Seeds many.<\/span><\/p>\n<\/div>\n