Abies durangensis var. coahuilensis (I.M. Johnst.) Mart. Abies durangensis var. coahuilensis (I.M. Johnst.) Mart., Pinac. Mex., ed. 3: 139. 1963 sec. Farjon 2001=Abies coahuilensis I.M. Johnst. in J. Arnold Arbor. 24(3): 332-335. 1943 syn. sec. Farjon 2001