Mimosa semispinosa Linnaeus, Species Plantarum 1: 522. 1753.

"Habitat in America." RCN: 7691.

Type not designated.

Original material: Herb. Clifford: 208, Mimosa 6 (BM) .

Current name: Acacia macracantha Humb. & Bonpl. ex Willd. ( Fabaceae: Mimosoideae).

Note: The application of this name is uncertain. Barneby (in Mem. New York. Bot. Gard. 65: 777. 1991) treated it as a species incertae sedis and did not trace a type. He noted that if the name proved to apply to a true Mimosa, the armature and leaf-formula would fit M. distachya var. oligacantha (DC.) Barneby. A Clifford collection (BM), only rather doubtfully associated with the name, is not a Mimosa, but close to Acacia macracantha Humb. & Bonpl. ex Willd., a very large and widely distributed complex in the neotropics (Rico, pers. comm.). Mimosa semispinosa appears to be a candidate for rejection.