Erect perennial 50–90 cm. tall; stems decumbent below and rooting at the lower nodes, succulent, branched in the basal part but generally unbranched above, pubescent when young.. Leaves spirally arranged; petiole 0.8–3 cm. long, finely pubescent; lamina ovate-lanceolate to ovate or ovate-elliptic, 2.6–8.8 cm. long, 1.7–4.6 cm. broad, the base slightly attenuate into the petiole, the apex acuminate, finely pubescent above and beneath; lateral veins 6–10 pairs; margin finely serrate-dentate to biserrate, the lowermost teeth filiform.. Flowers axillary, solitary or in pairs, epedunculate, deep rose pink or rose-magenta, the lateral united petals with a whitish spot towards the base.. Bracts linear-subulate, 2–3 mm. long, inconspicuous.. Pedicels slender, 4.5–5.2 cm. long, pubescent.. Lateral sepals linear, 5–6 mm. long, acute, pubescent.. Lower sepal shallowly and obliquely navicular, 10–11 mm. long, abruptly constricted into a 32–43 mm. long filiform spur, pubescent throughout.. Dorsal petal suborbicular-obcordate, 12–14 mm. long, 17–18 mm. broad, dorsally with a shallow crest terminating in a short acute point, pubescent along the crest.. Lateral united petals 19–23 mm. long; upper petal of each pair elliptic-oblong, somewhat asymmetric, 12–14 mm. long, 8–11 mm. broad; lower petal of each pair elliptic-obovate, 12–13 mm. long, 8–10 mm. broad, distally drawn out into a short obtuse triangular appendage, 2–4 mm. long, 2–3 mm. broad.. Ovary pubescent.. Fruit narrow-fusiform, 17–21 mm. long, 2–3 mm. broad, slightly pubescent.
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