Astragalus mollissimus var. irolanus (M.E. Jones) Barneby in Mem. New York Bot. Gard. 13: 740-742. 1964 sec. Téllez-Valdés 2009
- =Astragalus humboldtii A. Gray in Proc. Amer. Acad. Arts 6: 195. 1864 syn. sec. The Plant List 2013
- =Astragalus orizabae Seaton in Proc. Amer. Acad. Arts 28: 117. 1893 syn. sec. Téllez-Valdés 2009
- =Astragalus niquiriciaefolius Sessé & Moc., Fl. Mex. [ed. 2]: 168. 1894 syn. sec. Téllez-Valdés 2009
- =Astragalus orizabae var. irolanus M.E. Jones, Rev. N. Amer. Astragalus: 235, pl. 60. 1923 syn. sec. Téllez-Valdés 2009
- =Astragalus irolanus (M.E. Jones) Rydb., N. Amer. Fl. 24(7): 444. 1929 syn. sec. Téllez-Valdés 2009