Cactus pentagonus Linnaeus, Species Plantarum 1: 467. 1753.

"Habitat in America." RCN: 3574.

Type not designated.

Original material: none traced.

Current name: Acanthocereus tetragonus (L.) Hummelinck ( Cactaceae).

Note: See notes by Hunt (in Bradleya 9: 82. 1991).