O'Kane & Al-Shehbaz (Rollins) 2002 - Al-Shehbaz IA, O'kane SL (2002) Lesquerella Is United with Physaria (Brassicaceae). Novon 12(3): 319. doi: 10.2307/3393073.
There is no corrections for Physaria argyraea subsp. diffusa yet.