Procumbent to straggling perennial herb; stems up to 2 m. long, though generally less, moderately branched, often becoming rather woody and up to 6–7 mm. in diameter below, green or reddish tinged, rooting at the lower nodes, glabrous or sparsely pubescent in the younger parts.. Leaves spirally arranged; petiole 1–8.8(–9) cm. long, slender; lamina ovate to ovate-lanceolate or ovate-elliptical, 3.5–14.5(–16) cm. long, 2.2–7.5 cm. broad, the base rounded to slightly attenuate, the apex acuminate, glabrous or sparsely pubescent on both surfaces; lateral veins 7–12 pairs; margin crenate to crenate-dentate, with several 1.5–2.5 mm. long fimbriae towards, and at, the base.. Inflorescence a 2–8-flowered subumbellate raceme borne on the upper leaf-axils; flowers rose-pink or deep red.. Peduncle 2.8–8(–10.5) cm. long, glabrous or pubescent.. Bracts linear-lanceolate, 4–6 mm. long, usually pubescent, persistent.. Pedicels 1–4 cm. long, slender, ± pubescent.. Lateral sepals linear-lanceolate, 3–6 mm. long, ± pubescent.. Lower sepal narrowly navicular, 12–15 mm. long, 4–7 mm. deep, abruptly constricted into a 30–40 mm. long curved filiform spur, glabrous or pubescent.. Dorsal petal 10–13 mm. long, 5–7 mm. broad, cucullate.. Lateral united petals 20–38 mm. long; upper petal narrowly oblong, 5–10 mm. long, 2–4 mm. broad, entire; lower petal ± ovate, 16–28 mm. long, 12–23 mm. broad, distally with a slight emargination along the inner margin.. Ovary glabrous.. Fruit fusiform, ± 16–17 mm. long and 4–6 mm. broad, glabrous.
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