Moderately branched perennial to 1–1.5 m. tall; stems decumbent to erect, often rooting at the lower nodes, finely pubescent but becoming glabrescent, the older stems often rather woody, 3–4 mm. in diameter.. Leaves spirally arranged, dark green above, paler beneath; petiole 1–4 cm. long, slender, finely pubescent or glabrous; lamina ovate, 2–5 cm. long, 1.5–3.5 cm. broad, the apex acuminate, acute, the base subtruncate, but often slightly attenuate at the same time, sparsely pubescent above and beneath; lateral veins 4–6 pairs; margin shallowly serrate.. Inflorescence a 1–2-flowered subumbellate raceme; flowers rose-pink.. Peduncle 15–20 mm. long, slender, ± erect, pubescent or glabrous.. Bracts 2–3, linear-lanceolate, ± 2 mm. long, acute.. Pedicels 7–14 mm. long, slender.. Lateral sepals narrow, ovate, 1.5–2 mm. long, subobtuse, glabrous.. Lower sepal shallowly navicular, 7–8 mm. long, 2.5 mm. deep, abruptly constricted into a 17–26 mm. long curved filiform spur, finely pubescent or glabrous.. Dorsal petal suborbicular, 8–9 mm. long, 12–13 mm. broad, emarginate, dorsally with a narrow crest terminating in a short acute point, often finely pubescent along the crest.. Lateral united petals 15–16 mm. long, the upper and lower petals of each pair subequal in size and shape; upper petal elliptic-oblong, 12–13 mm. long, 6–7 mm. broad; lower petal elliptic-oblong, 13–14 mm. long, 6–7 mm. broad.. Ovary glabrous.. Fruit and seeds unknown.. Fig. 2/7, p. 4.
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