Shrub, often with many stems, or a tree to 10 m high; trunk to 0.3 diam.; crown often flattened and spreading somewhat. Bark pale to dark yellowish-or greyish-brown, rough, the outer layer papery and flaking or peeling off; young branchlets yellowish-or greyish-brown to purplish, puberulous to pubescent, sometimes glabrous, Shrub, often with many stems, or a tree to 10 m high; trunk to 0.3 diam.; crown often flattened and spreading somewhat. Bark pale to dark yellowish-or greyish-brown, rough, the outer layer papery and flaking or peeling off; young branchlets yellowish-or greyish-brown to purplish, puberulous to pubescent, sometimes glabrous, Seeds olive-brown, usually subcircular, 7-11 x 7-11 mm, compressed; areole 1-3 x 2-4.5 mm, horseshoe shaped.
Shrub or tree, up to 10 m high. Prickles in pairs below nodes. Leaf rhachis usually with gland at junction of some of the pinnae pairs or top pinna pair only; leaflets often falcate; petiole 12-25 mm long. Flowers yellowish white.