Hesperostipa (M.K. Elias) Barkworth Hesperostipa (M.K. Elias) Barkworth in Phytologia 74(1): 15. 1993 sec. Soreng & al. 2015=Stipa sect. Hesperostipa M.K. Elias in Special Pap. Geol. Soc. Amer. 41: 67. 1942 syn. sec. Dávila & al. 2006