Floral and Attendant Faunal Changes on the Lower Rio Grande .
Rio Grande Between Fort Quitman and Presidio, Texas 1. 2. Ronald W. . 1886) and at El Paso in 1683 (Espinosa 1940). In 1582 an early . This research was supported by International. Boundary and Water . wood abound in size, and where some judicious and . the late 1500's and reached their zenith in the late 1800's.