Shrub, up to 1.5 m tall with 7-15 (-18) mm long spines. Leaves mostly up to 8 x 3 cm, rarely up to 17 x 6 cm, glabrous, younger ones occasionally stellate tomentose. Flowers 2.5-4 cm long; bracteoles 10-15 mm long. Sepals lanceolate, as long as bracteole. Corolla pubescent externally. Anthers 2-3 (-3.5) mm long.