Physaria mexicana (Rollins) O'Kane & Al-Shehbaz Physaria mexicana (Rollins) O'Kane & Al-Shehbaz in Novon 12(3): 325. 2002 sec. Al Shehbaz & O'Kane Jr. 2002≡Lesquerella mexicana Rollins in Bol. Soc. Bot. México 23: 45. 1958 syn. sec. Al Shehbaz & O'Kane Jr. 2002