O'Kane (Rollins) 2007 - O'kane SL (2007) Physaria scrotiformis (Brassicaceae), a New High-Elevation Species from Southwestern Colorado and New Combinations in Physaria. Novon: A Journal for Botanical Nomenclature 17(3): 376. doi: 10.3417/1055-3177(2007)17[376:PSBANH]2.0.CO;2.
There is no corrections for Physaria geyeri subsp. purpurea yet.