Herbs, perennial, erect, to 40 cm tall; stems glabrous. Leaves subsessile; blade drying subleathery, adaxially dark green, abaxially pale green, elliptic, elliptic-oblong, or obovate, 8.5-15 × 5-9 cm, glabrous, base cuneate to rounded or cordulate, apex acute to obtuse; secondary veins 4-6 pairs but rather indistinct; stipules fused to leaf bases or very shortly around stem, triangular, 3-5 mm, shortly pubescent, ciliolate, acute. Inflorescence terminal, paniculate, many flowered, branched to several orders, glabrous, flushed with purple; peduncle 10-18 cm; axes flattened to 4-angled; bracts narrowly triangular, 0.2-3 mm; pedicels to 2 mm. Flowers sessile and/or pedicellate, distylous. Calyx glabrous; hypanthium portion obconic, ca. 1 mm; limb deeply lobed; lobes narrowly triangular to ovate, ca. 1.5 mm. Corolla white, tubular-urceolate, glabrous outside; tube ca. 3 mm, villous from middle into throat; lobes ovate to elliptic-triangular, 1.8-2.5 mm. Anthers included or exserted, 0.6-0.8 mm. Stigma included or exserted, ca. 1 mm. Fruit capsular, subglobose, ca. 2 mm, glabrous, weakly ribbed, septicidally dehiscent; seeds numerous, black, irregularly angled. Fl. Apr-Jun, fr. May-Oct.
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