Shrub to 2.5 m tall; young stems densely puberulous and with scattered longer hairs. Leaves with petiole to 7 mm long; lamina ovate to elliptic in outline, largest 10–17≈4–7.5 cm, deeply lobed with large triangular spine-tipped lobes, each lobe with 1–2 spines on both sides, apex acuminate, spine-tipped, base cuneate to truncate, beneath puberulous or densely so on midrib and larger veins, glabrous to puberulous on lamina, above puberulous on midrib, otherwise glabrous or with a few scattered hairs; stipule-like interpetiolar leaves present, with lamina up to 5 mm long, spiny. Cymes terminal or also axillary from uppermost axils, 3–14 cm long; rachis densely sericeous-tomentose, with several pairs of sterile bracts at base; bracts leathery, with 3–5 prominent longitudinal veins, straw-coloured, obovate, densely sericeous in basal part, sparsely so upwards, 2.3–3 cm long in middle of cyme, spine-tipped and with 12–25 large and small teeth per side, longest ± 7 mm, small teeth inserted on larger near their base, teeth densely hairy throughout with longest hairs 1–2 mm long; bracteoles linear-lanceolate, 2.3–3.1 cm long, with 5–7 teeth per side, longest ± 7 mm long. Calyx green with purple tips, thickened part yellow, sericeous or densely so with hairs to 3 mm long, conspicuously ciliate; dorsal and ventral sepals ovate or ovate-elliptic, dorsal 1–3-veined, 2.7–3.2 cm long, obtuse to acute and spine-tipped or with acuminate 2-toothed tip and with 1–8 lateral teeth per side, longest tooth ± 4 mm long, ventral sepal 2-veined, 2.3–2.7 cm long, with 2 triangular spine-tipped lobes ± 5 mm long and with 1–6 lateral teeth per side, longest tooth ± 3 mm long, lateral sepals 1-veined, ovate, 2–2.2 cm long, acuminate, without or with 1–2 small teeth per side. Corolla tube white, limb pinkish-mauve; tube 2–3 mm long below thickened rim which is 4–7 mm long and extended dorsally into a 2–7 mm long tooth; limb 3.5–5≈3–3.8 cm, below puberulous, above sparsely puberulous; callus with broad central groove and two narrow lateral ridges. Filaments 1.8–2 cm long, 2 dorsal hairy on inside near base; anthers 4–4.5 mm long, glabrous or with long curly hairs on sides. Capsule and seed not seen.
