Stiff divaricately-branched shrub, 1-3 m tall. Branchlets densely villous. Leaves flat, narrowly elliptic, rarely obovate, 1.5-5 cm long, 3-25 mm wide, attenuate or cuneate, usually dentate with 1-10 teeth 1-2 mm long per side, rarely entire, appressed-pubescent, glabrescent; mucro 1-2.5 mm long. Inflorescence with 22-28 flowers; involucre 4-6 mm long; bracts densely appressed-pubescent; rachis 3.5-4 (-8.5) mm long, villous; pedicels 3-5 mm long. Perianth 2.5-3 mm long, white. Pistil 4.5-5.5 mm long; ovary glabrous; gland present. Fruit obliquely ovate, 2.4-4 cm long, 1.5-2.3 cm wide, glabrous, black-pusticulate; horns 3-5 mm long. Seed obliquely obovate, 16-20 mm long; wing partly down one side of seed body only.
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