Stems to 1 m, glabrous. Leaves opposite; petiole 6-21 mm; leaf blade narrowly to broadly elliptic or lanceolate to obovate, 5-12 X 2-4.2 cm, leathery to thin leathery, glabrous, adaxially drying wrinkled, abaxially not punctate, base broadly cuneate to cuneate, margin entire, apex acuminate; lateral veins indistinct. Cymes axillary, 1-4-flowered; peduncle absent; bracts persistent, green, linear to lanceolate, ca. 6 X 1-2 mm. Pedicel 3-20 mm, puberulent to glabrous. Calyx green, 5-sect from base; segments lanceolate-linear to linear-oblanceolate, 4-7 X 1.5-2 mm, outside glabrous to rust-brown pubescent. Corolla red to yellow, 1.9-3 cm, outside sparsely puberulent, inside glabrous, mouth not oblique; limb indistinctly 2-lipped, lips nearly equal, 3.8-4 mm. Stamens exserted; filaments 1.8-2 cm; anthers coherent in pairs at apex, 1.8-2.2 mm; staminode 0.5-1 mm. Pistil 2.4-3 cm; ovary with small glands. Style ca. 8 mm, puberulent. Capsule 15-25 cm. Seeds with 2 hairlike appendages at hilar end, appendages, 0.8-1.2 cm, opposite end with 1 hairlike appendage 1.5-2 cm. Fl. Jul-Oct, fr. Nov.
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