Physaria thamnophila

Physaria thamnophila (syn. Lesquerella thamnophila) is a rare species of flowering plant in the mustard family known by the common name Zapata bladderpod. It is native to Texas in the United States, where it is known from Zapata and Starr Counties. The plant is threatened by the loss and degradation of its habitat. It is federally listed as an endangered species. This is a perennial herb producing one or more spreading stems from a woody base. The stems grow to 80 centimeters in maximum length. The herbage is silvery in color due to a coat of branching hairs. The leaves are oval to lance-shaped and smooth to faintly toothed on the edges, the lowest leaves reaching 12 centimeters long. The inflorescence is a raceme of yellow flowers. Blooming can occur through September whenever there is enough moisture. The population size can also increase rapidly after a significant amount of rainfall. This plant grows in desert shrublands above the Rio Grande floodplain in southern Texas. The substr......read more on Wikipedia.