Basal parts unknown. Stem > 50 cm, apparently scandent, branched, with branches diverging at wide angles, with arcuate internodes; accessory branches present in upper leaf axils. Middle cauline leaves shortly stalked, upper sessile; blade green, 4-5 × ternately compound; all divisions opposite and petiolulate; ultimate leaflets ovate to obovate, 0.5-1.5 × 0.5-1 cm, thin, entire. Rachis of leaf slightly geniculate at nodes with conspicuously arcuate internodes. Racemes 6-10-flowered; bracts lanceolate, 3-5 mm, entire. Pedicel 3-4 mm, thin. Sepals ca. 1 mm, deeply lacerate-dentate. Corolla yellow; outer petals with broad, rounded, acuminate, dentate limbs; upper petal narrowly crested; spur very strongly curved upward/forward, ca. 16 mm; nectary ca. 2/3 as long as spur; lower petal with very short claw and 6-7 mm wide rounded acuminate limb; inner petals ca. 7 mm, with broad rounded dorsal crests projecting beyond petal apex ca. 1 mm; claw shorter than limb. Stigma broader than long, apically cleft to almost 1/2, with 4 stalked apical papillae, and near apex with a pair of lateral papillae in conjunction with a pair of geminate papillae; basal corners rounded, without papillae. Fruit and seeds unknown. Fl. Jun.
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