Shrubs, sometimes arborescent, evergreen, 2–7 m. Stems erect, not rooting at nodes; branchlets brown, not thorn-tipped, round or slightly angled in cross section, flexible, tomentulose. Leaves: petiole 8–25 mm; blade not aromatic, flat to cupped, widely ovate to elliptic, 25–80 × 20–40 mm, herbaceous, not resinous, base rounded, margins serrulate, teeth (35–)40–65, apex acute to obtuse, abaxial surface pale green, usually densely tomentulose, rarely glabrate, adaxial surface green, dull, glabrous or sparsely puberulent; 3-veined from base. Inflorescences axillary or terminal, paniclelike, conic, 5–12 cm. Flowers: sepals and petals pale blue to blue; nectary blue to dark blue. Capsules 6–8 mm wide, ± lobed; valves rugose, ± viscid, weakly crested. 2n = 24.
Can be grown by cuttings or seedlings. Seeds needs soaking.
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