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A new infraspecific taxon of the widespread western species Stanleya pinnata is described from the Big Bend Region of Trans-Pecos, Texas as var. texana. The taxon is distinguished from other varieties of S. pinnata in having smaller flowers, nearly glabrous gynophores, and lanceolate entire leaves which are, so far as known, never deeply divided or pinnate. It is isolated from the closest known populations of S. pinnata by some 500 km and is represented by small populations largely restricted to bare gypso-calcareous outcrops in southern Brewster Co., Texas. In addition, the long recognized S. pinnata var. integrifolia is reduced to the rank of forma integrifolia.

A New Variety of Stanleya pinnata (Brassicaceae) from the Big Bend Region of Trans-Pecos, Texas