Stems, petioles, pedicels, and hypanthia sparsely glandular-pilose with hairs 1.5-2 mm. long; stem erect, angular, freely branched; petioles slender, 10-15 mm. long; leaf-blades ovate or ovate-oblong, 4-8 cm. long, 2-4 cm. wide, acuminate, minutely denticulate, rounded to subcordate at base, 7-nerved, pilose on both sides; inflorescence large, freely branched, the pedicels 2 mm. long; hypanthium cam-panulate, 6 mm. long, 10-ribbed; sepals linear-subulate, 6 mm. long; petals purple, broadly obovate, setose at the tip, 14 mm. long; sterile stamens 4.5 mm. long; filaments 5.5 mm. long; anthers 6.5 mm. long, tipped with a bent beak 2 mm. long, the connective prolonged 3 mm. at base; ovary free, 3-celled, minutely glandular-pubescent at the summit; style 19 mm. long.
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