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Lateral sepals 4–5 × 1·75–2·5 mm., broadly lanceolate-triangular, acute or finely acuminate, glabrous or sparsely pilose; posterior sepal 8–11 mm. long and c. 2·5 mm. deep (excluding the spur), shallowly obliquely navicular, abruptly constricted into the spur, distally acute or subcaudate (purplish-vittate ?) somewhat pilose mainly towards the keel-line; spur up to 25 (30) mm. long, slightly incurved, slender, tapering into a bluntish (rarely slightly thickened) end, usually pilose, very rarely glabrous.
Anterior petal 8–10 mm. long and up to 10 mm. broad (when flattened), helmet-shaped, dorsally distinctly cristate, with the crest terminating in a sharp point, usually pilose on the crest; lateral pair of united petals 18–22 mm. long, deeply 2-lobed, usually glabrous; anterior lobe 12–17 × 7–10 mm., transversely broadly semi-elliptic, entire; posterior lobe c. 1/3 the size of the anterior one (rarely smaller), obovate to oblong (see t. 26 fig. 14).
Flowers axillary, solitary or in bundles of 2–3, pale mauve or pink; bracts very small, lanceolate-triangular or subulate, tapering into a fine point; pedicels 2–6 cm. long, very slender, pilose or glabrous.
Usually prostrate, sometimes erect perennial (?) herb; stems up to 180 cm. long or more, rooting at the lower nodes, red, pilose on younger usually glabrescent on older parts.
Capsule not seen in a mature state, pilose or glabrescent.
Ovary ± densely pilose.
Seeds numerous.
