Subshrubs 0.6-1.2(-2) m tall. Stems erect, densely spreading purplish or dull yellow villous-velutinous. Petiole 2-8 mm (excluding winged portion), densely puberulent; leaf blade ovate to triangular-ovate, 1.5-7 × 1-4 cm, ± membranous to papery, corrugate, base broadly cuneate, abruptly attenuate, margin serrate to subcrenate, apex acute to short acuminate, velvety, lateral veins ca. 4-paired. Thyrses 5-10 cm, lax, narrow; cymes pedunculate, 3-7-flowered, densely velvety; floral leaves ovate to subcircular. Calyx campanulate, 2.5-3 mm, pilose outside; teeth subequal, ovate-lanceolate to ovate-triangular, apex acute, ca. 1/2 as long as calyx; fruiting calyx tubular-campanulate, slightly dilated, to 4 mm, conspicuously veined. Corolla purple or whitish blue, 5-7 mm, sparsely puberulent outside, glandular. Stamens included. Style slightly exserted. Nutlets dark brown, depressed subglobose, ca. 1 mm, glabrous. Fl. Aug-Sep, fr. Sep.
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