Glaucocarpum suffrutescens (Rollins) Rollins

Glaucocarpum suffrutescens (Rollins) Rollins. Hesperidanthus suffrutescens is a species of flowering plant in the mustard family. Its synonyms include Glaucocarpum suffrutescens. When placed in the genus Glaucocarpum, it was the only species. It is a rare species known by the common names toad-flax cress, shrubby reed-mustard, Uinta Basin waxfruit and waxfruit mustard. It is endemic to Utah in the United States, where it is known only from Duchesne and Uintah Counties. It is threatened by habitat degradation and destruction. It is federally listed as an endangered species of the United States.