Pennellia microsperma (Rollins) R.A. Price, C.D. Bailey & Al-Shehbaz Pennellia microsperma (Rollins) R.A. Price, C.D. Bailey & Al-Shehbaz in Novon 11(3): 339. 2001 sec. Warwick & Al-Shehbaz 2006≡Arabis microsperma Rollins, Crucifer. Continental N. Amer.: 176-177. 1993 syn. sec. Warwick & al. 2006