Cereus greggii Engelm., Mem. Tour N. Mexico: 102. 1848 Cereus greggii Engelm., Mem. Tour N. Mexico: 102. 1848is basionym for Peniocereus greggii (Engelm.) Britton & Rose in Contr. U.S. Natl. Herb. 12: 428, pl. 74, 75. 1909is basionym for Peniocereus greggii subsp. greggiiTaxon for this nameCereus greggii Engelm.