Pelecyphora tuberculosa (Engelm.) D.Aquino & Dan. Sanchez comb. nov.

Mammillaria tuberculosa ≡ Mammillaria tuberculosa Engelm., Proc. Amer. Acad. Arts 3: 268. 1856. Coryphantha tuberculosa (Engelm.) Orcutt, Circular to Cactus Fanciers: i. 1922. Escobaria tuberculosa (Engelm.) Britton & Rose, Cactaceae 4: 54. 1923. Coryphantha tuberculosa (Engelm.) A.Berger, Kakteen: 280. 1929. Type: [ México], Flounce mountains below El Paso, Below San Elisario on the Río Grande, Jun 1852, J. Bigelow s.n. (lectotype, designated by Benson, Cacti U. S. Canada: 962. 1982: MO [2017442 image!]).

Mammillaria tuberculata = Mammillaria tuberculata Engelm., Syn. Cact. U.S.: 12. 1856. Cactus tuberculosus (Engelm.) Kuntze, Revis. Gen. Pl. 1: 261. 1891. Notes. When comparing the original description Mammillaria tuberculata (https://www.biodiversitylibrary.org/page/32558530#page/12/mode/1up), it clearly corresponds a duplicate of the description of M. tuberculosa Engelm. Therefore, in the absence of diagnosis and designation of a type, it should be considered as nomen nudum (Turland et al. 2018).

Mammillaria strobiliformis rufispina = Mammillaria strobiliformis var. rufispina Quehl, Monatsschr. Kakteenk. 17: 87. 1907. Mammillaria strobiliformis f. rufispina (Quehl) Schelle, Kakteen: 285. 1926. Type: Mexico (Not preserved).

Mammillaria strobiliformis pubescens = Mammillaria strobiliformis var. pubescens Quehl, Monatsschr. Kakteenk. 17: 87. 1907. Mammillaria strobiliformis f. pubescens (Quehl) Schelle, Kakteen: 285. 1926. Escobaria tuberculosa var. pubescens (Quehl) Y. Itô, Cacti 1952: 113. 1952. Type: Mexico (Not preserved).

Mammillaria strobiliformis durispina = Mammillaria strobiliformis var. durispina Quehl, Monatsschr. Kakteenk. 17: 87. 1907. Mammillaria strobiliformis f. durispina (Quehl) Schelle, Kakteen: 285. 1926. Escobaria tuberculosa var. durispina (Quehl) Børgesen, Borg, J., Cacti 304. 1937. Coryphantha strobiliformis var. durispina (Quehl) L.D.Benson, Cact. Succ. J. (Los Angeles) 41: 189. 1969. Escobaria strobiliformis var. durispina (Quehl) Bravo, Cact. Suc. Mex. 27: 17. 1982. Type. United States, Texas, Brewster County, Terlingua H. Kuenzler s.n. (neotype, designated by Benson, Cact. Succ. J. (Los Angeles): 189. 1969: POM [311333 image!]).

Coryphantha varicolor = Coryphantha varicolor Tiegel, Monatsschr. Deutsch. Kakteen-Ges. 3: 278. 1932. Coryphantha dasyacantha var. varicolor (Tiegel) L.D.Benson, Cact. Succ. J. (Los Angeles) 41: 189. 1969. Escobaria dasyacantha var. varicolor (Tiegel) D.R.Hunt, Cact. Succ. J. Gr. Brit. 40: 13. 1978. Escobaria tuberculosa var. varicolor (Tiegel) S.Brack & K.D.Heil, Cact. Succ. J. (Los Angeles) 60: 17. 1988. Escobaria tuberculosa subsp. varicolor (Tiegel) Lüthy, Kakteen And. Sukk. 50: 257. 1999. Coryphantha tuberculosa var. varicolor (Tiegel) A.D.Zimmerman, Cacti Trans-Pecos: 436. 2004. Type. United States, Texas, Brewster County, hills south of Marathon, 3800 ft [1158 m],03 Apr 1947, B. H. Warnock 47-467 (neotype, designated by Benson, Cact. Succ. J. (Los Angeles): 189. 1969: SRSC).

Escobaria strobiliformis sisperai = Escobaria strobiliformis subsp. sisperai Halda & Sladk. Acta Mus. Richnov. Sect. Nat. 7: 35. 2000. Type: México, Nuevo Léon, via bitumine constrata inter-Monterrey et Tampico, non procul a via publica prope compitum Marin, 07 Apr 1985, J.J. Halda & J. Sladkovský 85040073 (holotype PR).