Lesquerella is the former name of a genus of flowering plants in the family Brassicaceae.Genus: Lesquerella S. Watson USDA GRIN Taxonomy for Plants Recent work has shown that Lesquerella is indistinct from the genus Physaria and both genera have been united under Physaria.Ihsan A. Al-Shehbaz and Steve L. O'Kane, Jr. "Lesquerella Is United with Physaria (Brassicaceae)" Novon Vol. 12, No. 3 (Autumn, 2002), pp. 319–329 In addition, the former Lesquerella of the southeastern United States have been moved to the genus Paysonia since 2002.Paysonia, a New Genus Segregated from Lesquerella (Brassicaceae)" Novon Vol. 12, No. 3 (Autumn, 2002), pp. 379–381 The genus Lesquerella is now no longer applied to any species and is considered defunct.
The genus is named in honor of Leo Lesquereux, 1805–1889, Swiss and American botanist.Serano Watson, "Contributions to American Botany, XV" Proceedings of the American Academy of Arts and Sciences 23 (1888) 249–287.
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