Shrub to 2.5 m high; branches ascending, columnar. Branchlets densely hirsute, with hairs ferruginous, persistent. Leaves rigid, elliptic in cross-section, narrowly elliptic to obovate, 1-2 cm long, 2-6 mm wide, narrowly attenuate, with 3-8 teeth or segments towards apex, sparsely or moderately appressed-sericeous; hairs ferruginous, quickly glabrescent; mucro 1-2 mm long. Inflorescence with 18-26 flowers; involucre 5 mm long; bracts densely white-villous apically; rachis 2-4 mm long, densely hirsute; pedicels 3-5.5 mm long. Perianth 2.8-3.5 mm long, white. Pistil 5-5.5 mm long; ovary glabrous; gland present. Fruit obliquely ovate, 1.7-1.8 cm long, 0.8-0.9 cm wide, glabrous, coarsely tuberculate or smooth; horns c. 3 mm long. Seed not seen.
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