Impatiens platyadena C. Fisher in Bull. Misc. Inform. 1934: 393. 1934.

Undershrubs, up to 1 m high; stems angled. Leaves alternate, elliptic-lanceolate, acuminate, crenate-serrate with apiculate crenations, 8 - 17 x 3.5 - 7 cm, decurrent on petiole; nerves impressed above, slightly prominent beneath; decurrent part of blade with 4 - 8 marginal, flattened, white glands. Racemes axillary; peduncles patent or slightly drooping, slender, 2.5 - 4.5 cm long. Flowers ca 1.5 cm long; bracts ovate, 8 - 15 mm long, persistent. Lateral sepals suborbicular, ca 6 mm across, cream-coloured. Lip funnel-shaped, ca 1.2 cm long, pinkish; spur tubular, up curved into a semicircle, cream-coloured. Standard ovate, 7 - 8 mm long. Wings 1.5 - 1.6 cm long, 2-lobed; basal lobes triangular-ovate, acute or obtuse; distal lobes semiovate, subacute, 1 - 1.2 cm long, scarlet. Capsules ovoid, acute, ca 6 mm long, accrescent; seeds pyriform, 1.5 - 2 mm long, mottled brown, minutely papillose.

Fl. & Fr. Sept.

Distrib. India: In grasslands at an altitude of 2000 m in southern W. Ghats. Kerala (Idukki Dist. - Nemakad Gap).

Endemic and probably extinct species. Not located since type collection.