Stems 50-100 cm, glabrous. Leaves opposite; petiole 3-8 mm; leaf blade narrowly to broadly oblanceolate or rarely lanceolate, 4.2-9 X 0.6-2.5(-3.3) cm, leathery, glabrous, adaxially drying wrinkled, abaxially sparsely punctate, base cuneate to attenuate, margin entire to nearly entire, apex acuminate to subcaudate; lateral veins indistinct. Cymes axillary, 1-4-flowered; peduncle 1.8-5 cm; bracts persistent, red, lanceolate, 1-1.8 cm X 4-5(-8) mm. Pedicel 3-10 mm, glabrous. Calyx red, 5-sect from base; segments lanceolate to elliptic, 1.1-1.3 cm X 3-4 mm, outside glabrous. Corolla red, 3-3.5 cm, outside glabrous, inside sparsely glandular puberulent above, without tufts of hairs, mouth slightly oblique; limb indistinctly 2-lipped; adaxial lip ca. 4 mm; abaxial lip ca. 5.5 mm. Stamens exserted; filaments 1.4-2 cm; anthers coherent in pairs at apex, ca. 2 mm; staminode ca. 1 mm. Pistil ca. 2.1 cm; ovary glabrous. Style ca. 2.5 mm, puberulent. Capsule 5-10 cm. Seeds with 1 hairlike appendage at each end, appendages ca. 1.5 mm. Fl. Jul-Sep, fr. Oct.
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