Straggly shrub to 2 m tall, lignotuberous. Branchlets glabrous, glaucous. Leaves subpetiolate, obovate, 4.5-8 cm long, 2-5 cm wide, attenuate, dentate with teeth mucronate, glabrous, red and glaucous when young. Inflorescence with 24-42 flowers; involucre c. 5 mm long; rachis 8.5-15 mm long, hirsute, with hairs white or pale brown; pedicels 4-9 mm long. Perianth 2-3 mm long, cream-white, faintly scented, not glaucous. Fruit obliquely ovate, 3.5-4.8 cm long, 2.3-3 cm wide, smooth, green, with toothed crest along sutures and abaxially; horns 5-8 mm long. Seed elliptic, 30-34 mm long; wing encircling seed body or broadly down one side, narrowly down other.
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