Erect perennial, 100-500 mm, nearly glabrous but nodes sparsely pubescent. Leaves elliptic to trullate 15-65 x 9-20 mm; venation reticulate with up to 8 pairs of lateral veins, with sparse scattered hairs. Inflorescence up to 90 mm, bearing 7-20 flowers 5-13 mm apart; bracts 6 x 1.5 mm, bracteoles linear, minute. Calyx lobes 0.5-1 x 6-7 mm, conspicuously hairy on both surfaces, with glandular and eglandular hairs. Corolla tube 25 x 2.5 mm; lower lateral lobes 8 x 5 mm reflexed, lower median lobe 10 x 5 mm, with a poorly developed palate and insignificant nectar guides. Anther connective glandular pubescent. Pollen bicolporate, margocolpi 2 pairs; inner pair well-defined bands and outer pair areolate or ill defined. Ovary oblong 3-4 x 2 mm, densely covered with sessile glands; style 25-26 mm, glabrous; stigma broadly bifid. Capsule 23 mm long, stipe 10 mm, jaculators bifid at tips. Seeds pyriform, 6-8 mm, compressed but with convex sides; tubercles irregular, pointed.
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