Stems 40-120 cm, brown sericeous, glabrescent. Leaves opposite; petiole 3.5-10 mm; leaf blade narrowly ovate to ovate or elliptic, 2.9-8 X 1.4-2.9 cm, thin leathery, glabrous, adaxially drying smooth or slightly wrinkled, abaxially not punctate, base cuneate to rounded, margin entire, apex acuminate to acute; lateral veins indistinct. Cymes axillary, 1-or 2-flowered; peduncle absent; bracts deciduous. Pedicel 0.8-1.4 cm, puberulent. Calyx green, 1-1.8 cm, 5-lobed from slightly below middle to-sect from near base in the same flower; tube 3.5-4 mm in diam. at mouth; lobes linear-lanceolate, 4.5-13 X 0.6-2 mm, outside sparsely to densely pilose. Corolla red, 2.5-2.8 cm, outside pilose, inside sparsely puberulent above base, without tufts of hairs, mouth not oblique; limb indistinctly 2-lipped; adaxial lip ca. 3 mm; abaxial lip ca. 2.5 mm. Stamens exserted; filaments 2.5-2.9 cm; anthers coherent in pairs at apex, 1.8-2.2 mm; staminode ca. 4 mm. Pistil 3.5-4.2 cm; ovary glabrous. Style 2-2.4 cm, sparsely puberulent. Capsule ca. 20 cm. Seeds unknown. Fl. Aug-Sep, fr. Sep.
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