Leaves solitary or partly sub geminate; petiole 0.5–4.5 cm long; lamina membranous, 3–22.5 × 1–9 cm, lanceolate to obovate, base cuneate, gradually narrowing into the petiole and ± unequal-sided, apex acute or acuminate, occasionally ± obtuse, somewhat sub-repand to scarcely undulate, rarely ± entire, tending to dry blackish, initially with ± abundant whitish hairs, soon becoming sparsely hairy to quite glabrous with age, underside paler, with 5–9 pairs of lateral nerves.
Corolla bluish to pale violet or lilacineous, sometimes white, campanulate-stelliform; limb 8–15 mm across; lobes 3–8 × 1–3.5 mm, linear-lanceolate or lanceolate, acute, ± densely hairy outside mainly on the median part, glabrous except for a few stellate hairs scattered along the midvein or only near the apex inside, erect to reflexed.
Calyx 2–4(5) mm long, somewhat accrescent, campanulate or cupular, ± hairy; lobes somewhat unequal, 0.5–2(3) × 0.5–1 mm, ovate-triangular to triangular-elongate or broadly obovate, acute or mucronate to narrowly long-acuminate, in fruit enlarged to 5 × 2 mm, curved out at the apex, finally ± reflexed.
Perennial herb or small shrub, occasionally scandent, up to 2(3) m, unarmed; sympodia difoliate; hairs stellate, off-white, sometimes violaceous or reddish tinged, minute (0.2–0.3 mm across), ± sessile, regular, with many short rays.
Ovary 0.7–1 mm in diameter, ± globose, glabrous or with few minute glands near the apex; style 4.5–8.5 mm long, exceeding the stamens, often arcuate at the apex, glabrous or with few minute glands near the base.
Flowers (4)5-merous, ± nodding; pedicels 5–11 mm long, slender, at first often densely hairy, glabrescent except at the base, in fruit elongated to 16 mm, somewhat thickened distally, ascending or erect.
Cymes soon leaf-opposed or leaf-remote, forked 1–2 times or rarely unbranched, racemiform, 1.5–3 cm long, 3–24-flowered, ± pulverulent-tomentose; peduncle 0.1–1.8 cm long; rhachis 0.1–0.8 cm long.
Stamen filaments 0.5–1 mm long; anthers 3–5 × 0.8–1.2 mm, lanceolate-elliptic in outline, slightly obtuse, not very emarginate at the apex.
Seeds not very numerous, pale yellowish, 3–5 × 2.5–4 mm, compressed, somewhat obliquely reniform, largely reticulate-tuberculate.
Fruit shining bright to deep red when ripe, 6–10 mm in diameter, globose, soft.
Branches floccose-tomentose at first, gradually glabrescent.
A shrub.