Shrub up to 3(-6) m tall. Branchlets 5-12 mm thick, puberulous to hirtellous and with stinging prickles with a broad base. Stipules 0.5-2.5 cm long, puberulous, caducous; petiole 3-22 cm long, hirtellous and with stinging prickles; blade chartaceous, broadly ovate to elliptic or narrowly ovate to oblong, 8-31 x (3.5-)8-26 cm, apex acuminate to acute, base obtuse to subcordate, margin coarsely dentate to sinuate-dentate, usually scabridulous and almost glabrous above, puberulous to hirtellous, and with stinging prickles on the main veins beneath; secondary veins 6-10 pairs. Inflorescences in the leaf axils and also below the leaves, up to ca. 10 cm long, flowers usually solitary. Staminate flowers sessile or subsessile; tepals 4-5, 1-1.5 mm long; stamens 4-5. Pistillate flowers with up to 2 mm long pedicel; tepals unequal, 0.3-0.5 mm long. Achene lens-shaped, ca. 3-4 mm, crimson; fruiting perianth white.