]> Botany [collector note: Tamaulipas, Mexico, 1944; GH, TEX] Heard, Norman T., & Barkley, Fred Alexander Heard, Norman T., & Barkley, Fred Alexander N. T. Heard & F. A. Barkley Norman T. Heard & Fred Alexander Barkley Heard, N. T., & Barkley, F. A.