Subshrub or woody herb 0.9–1.2 m. tall; stems densely pubescent.. Leaves opposite or in whorls of 3; blades elliptic, 3–6 cm. long, 1.5–3.5 cm. wide, subacute or obtuse at the apex, cuneate at the base, densely covered with short spreading rather rigid hairs; petioles 2–6 mm. long; stipules with 5 setae, 2–5 mm. long, from a 1 mm. long base.. Inflorescence usually no more than 10-flowered.. Calyx-tube 2 mm. long, densely pubescent, strongly ribbed; lobes unequal, oblong, elliptic or subspathulate, 3–7 mm. long, 1.2–4 mm. wide, rather obtuse at the apex, the apical parts often blackish or bluish inside in living plants in fruit, the main nerves parallel and conspicuous.. Corolla white or greenish cream; tube (3–)5.5–9 cm. long (usually ± 7 cm.), 3 mm. wide, pubescent outside; lobes 4–5, oblong, 6–10 mm. long, 2–2.5 mm. wide.. Style exserted 1 cm. in long-styled flowers, tomentellous.. Capsule oblong, 6–8 mm. long, 5–6.5 mm. wide, strongly ribbed, densely pubescent.
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