Wilcoxia Britton & Rose, Contributions from the U. S. National Herbarium 12 (10): 434, 1909

Wilcoxia albiflora Backeberg, Cactus (Paris) 7: 33, 1952

Wilcoxia australis 

Wilcoxia diguetii (F.A.C. Weber) Diguet & Guillaumin, Arch. Hist. Nat. Soc. Acclim. 4: 222, 1928

Wilcoxia kroenleinii A. Cartier, Succulentes, 1980 (2): 2, 1980

Wilcoxia lazaro-cardenasii (Contreras et al.) A. Cartier, Maandbl. Liefhebb. Cact. Vetpl., cf. Repert. Pl. Succ. (I. O. S.), 3 (11): 164, contrary to Art. 33. 2 ICBN (1988); 41: 12 (1990 publ. 1991): 1990

Wilcoxia mariana Gentry, Rio Mayo Plants 191, 1942

Wilcoxia nerispina A. Cartier, Succulentes, 2nd ser., 1980 (4): 9, nom. provis. without latin descr. or type, 1980

Wilcoxia papillosa Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 2: 112, 1920

Wilcoxia poselgeri (Lemaire) Britton & Rose, Contributions from the U. S. National Herbarium 12 (10): 434, 1909

Wilcoxia schmollii (Weingart) F.M. Knuth, Kaktus-ABC 323, 1931

Wilcoxia schmollii v. lanata hort. ex A. Cartier, Maandbl. Liefhebb. Cact. Vetpl., cf. Repert. Pl. Succ. (I. O. S.), 3 (10): 146, nom. provis., without latin descr. or type 41: 12 (1990 publ. 1991), 1990

Wilcoxia striata (Brandegee) Britton & Rose, Contributions from the U. S. National Herbarium 12: 434, 1909

Wilcoxia tamaulipensis Werdermann, Kakteenkunde, 86., 1938

Wilcoxia tamaulipensis v. brevispina A. Cartier, Maandbl. Liefhebb. Cact. Vetpl., cf. Repert. Pl. Succ. (I. O. S.), 3 (8): 123, nom. provis. without latin descr. or type; 41: 12 (1990 publ. 1991), 1990

Wilcoxia tamaulipensis v. brevissima A. Cartier, Succulentes, 2nd ser., 1980 (4): 7, nom. provis. without latin descr. or type, 1980

Wilcoxia tamaulipensis v. deherdtii  

Wilcoxia tomentosa H. Bravo Hollis, Cactaceas y suculentas mexicanas 3 (2): 28-29, 32, f. 17-18, 1958

Wilcoxia tuberosa Kreuzinger  1929

Wilcoxia viperina (F.A.C. Weber) Britton & Rose, Contributions from the U. S. National Herbarium 16 (7): 242, 1913

Wilcoxia viperina v. tomentosa (H. Bravo Hollis) H. Bravo Hollis, Cactaceas y suculentas mexicanas 19 (2): 47, 1974

Wilcoxia viperina v. viperina  

Wilcoxia waldesii 

Wilcoxia zopilotensis J. Meyran, Cactaceas y suculentas mexicanas 14: 51, 1969