Thelypodiopsis argillacea Welsh and Atwood sp. nov. is described from specimens collected on the Green River Shale Formation in Uintah County, Utah.
Welsh, Stanley L. and Atwood, N. Duane
"An undescribed species of Thelypodiopsis (Brassicaceae) from the Uinta Basin, Utah,"
Great Basin Naturalist: Vol. 37
, Article 11.
Available at: http://scholarsarchive.byu.edu/gbn/vol37/iss1/11