Leaves
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Leaves opposite or in whorls of 3 per node, borne on upper 3-6 nodes, those at a node slightly unequal, symmetrical, thick, chartaceous, elliptic, 15-32.5 cm long, 3.2-9.6 cm wide, upper surface very sparsely hirtellous, lower surface appressed short-pilose on veins, otherwise glabrate to sparsely appressed short-pilose throughout, margins serrate, apex acuminate, base cuneate, petioles 3.8-9.8 cm long.
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Flowers
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Flowers (1-)3-5 in open cymes arising in the leaf axils, moderately to densely appressed brown pilose, peduncles stout, 6-20 mm long, pedicels 20-25 mm long, elongating up to 35 mm long in fruit, bracts foliaceous, elliptic, 18-40 mm long; calyx nearly actinomorphic, pale green when fresh, thick, 18-25 mm long, cleft nearly to base, the lobes foliaceous, ovate, sparsely brown pilose, glabrous within, margins revolute and ± undulate, apex acute to acuminate; corolla white, tube subcylindrical, ca. 15-18 mm long, ca. 5-6 mm in diameter medially, pilose, upper lobes broadly elliptic, ca. 5-6 mm long, 6-7 mm wide, lower lobes broadly elliptic, ca. 8-9 mm long, ca. 6-9 mm wide; ovary glabrous; style ca. 2-3 mm long, glabrous.
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