Cereus insularis Hemsl. in Rep. Challenger, Bot. 1(2): 16. 1884 Cereus insularis Hemsl. in Rep. Challenger, Bot. 1(2): 16. 1884is basionym for Monvillea insularis (Hemsl.) Britton & Rose, Cactaceae 2: 23, f. 21. 1920Taxon for this nameCereus insularis Hemsl. in Rep. Challenger, Bot. 1(2): 16. 1884