Plants 0.3-1.5 m, branches erect, 0.3-1.5 m. Leaves: petiole 3-6 mm; blade oblong to elliptic, 1-6 cm, margins sparsely toothed, apex shortly acute to obtuse, surfaces glabrous. Inflorescences fascicled, sessile, dense, 20-60-flowered, 5-15 cm; bracts deciduous, ovate, 1.7-2 mm. Pedicels 2-3 mm. Flowers: sepals whitish, lanceolate-ovate, 2.5-3.3 mm, apex acute or subacute; corolla urceolate, 6-8 mm; filaments glabrous; anthers 1.2-1.4 mm, with 2 awns (sometimes awns absent); ovary glabrous. Capsules 4.5-6 mm wide. Seeds ellipsoid or oblong; testa firm, reticulate.
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