Pelecyphora missouriensis Neotype: United States of America, North Dakota, Burleigh County, 3 mi [4.8 km] W of Baldwin turnoff, 1.3 m [2.09 km] E of Missouri River, Jun 1970, L. Mitich s.n. (POM: 317949) Lectotype: United States of America, South Dakota, Ft. Pierre, on the Upper Missouri, 1847, F. V. Hayden s.n. (MO: 899104, 899105, two sheets) Lectotype: United States of America, cult. in hort. Göbels, St Louis, May 1846, F. Lindheimer s.n. (MO) Lectotype: United States of America, Texas, Piedernales [Perdenales] [River, Texas], May 1846, F. Lindheimer s.n. (MO: 2017430) Lectotype: United States of America, Deer Londge, Mont., 1 Jun 1891, F. N. Notestein s.n. (NY: 385874) Neotype: United States of America, Utah, Kane County, east side of Buckskin Mountains, alt. 1584 m, L. D. Benson & R. Benson 15205 (POM: 285320, 296309, two sheets) Holotype: United States of America, Arizona, Navajoa, alt. 1600 – 1800 m, F. Hochstätter 1000 (HBG) Isoneotype: United States of America, North Dakota, Burleigh County, 3 mi [4.8 km] W of Baldwin turnoff, 1.3 m [2.09 km] E of Missouri River, Jun 1970, L. Mitich s.n. (NDA) Isolectotype: United States of America, Deer Londge, Mont., 1 Jun 1891, F. N. Notestein s.n. (US: 1821122)