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

"Habitat in America." RCN: 3578.

Type not designated.

Original material: none traced.

Current name: Pilosocereus royenii (L.) Byles & G.D. Rowley ( Cactaceae).

Note: Specific epithet spelled “Royeni” in the protologue.