Alan Cressler:
Adiantum capillus-veneris, Cattail Falls, Chisos Mountains, Big Bend National Park, Brewster County, Texas 1
Alan Cressler:
Agave Xglomeruliflora, Cattail Canyon, Chisos Mountains, Big Bend National Park, Brewster County, Texas 1
Alan Cressler:
Agave Xglomeruliflora, Cattail Canyon, Chisos Mountains, Big Bend National Park, Brewster County, Texas 4
Alan Cressler:
Aguja Formation, Late Cretaceous age, Concretions, Big Bend National Park, Brewster County, Texas 1
Alan Cressler:
Aguja Formation, Late Cretaceous age, Concretions, Big Bend National Park, Brewster County, Texas 2
Alan Cressler:
Aguja Formation, Late Cretaceous age, Concretions, Big Bend National Park, Brewster County, Texas 3
Alan Cressler:
Aguja Formation, Prehistoric Petroglyphs, Big Bend National Park, Brewster County, Texas 1
Alan Cressler:
Aguja Formation, Prehistoric Pictographs, Big Bend National Park, Brewster County, Texas 1
Alan Cressler:
Aguja Formation, Prehistoric Pictographs, Big Bend National Park, Brewster County, Texas 2
Alan Cressler:
Aguja Formation, Prehistoric Pictographs, Big Bend National Park, Brewster County, Texas 2 Enhanced
Alan Cressler:
Aguja Formation, Prehistoric Pictographs, Big Bend National Park, Brewster County, Texas 3
Alan Cressler:
Aguja Formation, Prehistoric Pictographs, Big Bend National Park, Brewster County, Texas 3 Enhanced
Alan Cressler:
Aguja Formation, Prehistoric Pictographs, Big Bend National Park, Brewster County, Texas 4
Alan Cressler:
Aguja Formation, Prehistoric Pictographs, Big Bend National Park, Brewster County, Texas 5
Alan Cressler:
Aguja Formation, Prehistoric Pictographs, Big Bend National Park, Brewster County, Texas 5 Enhanced
Alan Cressler:
Aguja Formation, Prehistoric Pictographs, Big Bend National Park, Brewster County, Texas 6
Alan Cressler:
Aguja Formation, Prehistoric Pictographs, Big Bend National Park, Brewster County, Texas 8
Alan Cressler:
Aguja Formation, Prehistoric Pictographs, Big Bend National Park, Brewster County, Texas 9
Alan Cressler:
Allionia incarnata, Tributary of Tornillo Creek, Big Bend National Park, Brewster County, Texas 2
Alan Cressler:
Astrolepis sinuata, Chisos Mountains, Big Bend National Park, Brewster County, Texas 1
Alan Cressler:
Bommeria hispida, Cattail Canyon, Chisos Mountains, Big Bend National Park, Brewster County, Texas 5
Alan Cressler:
Boquillas Canyon Area, Rio Grande, Big Bend National Park, Brewster County, Texas, and Natural Protegida Maderas del Carmen, Coahuila, Mexico 1
Alan Cressler:
Boquillas Canyon, Sand Dune, Big Bend National Park, Brewster County, Texas, Jeff Moore 2
Alan Cressler:
Boquillas Canyon, Sand Dune, Big Bend National Park, Brewster County, Texas, Manuel Beers 1
Alan Cressler:
Bufo punctatus, Tuff Canyon, Big Bend National Park, Brewster County, Texas 1
Alan Cressler:
Bufo punctatus, Tuff Canyon, Big Bend National Park, Brewster County, Texas 7
Alan Cressler:
Burro Mesa Pouroff, Big Bend National Park, Brewster County, Texas 2
Alan Cressler:
Cane Hot Spring, Big Bend National Park, Brewster County, Texas, Paul Aughey, Doug Strait, Manuel Beers 2
Alan Cressler:
Cane Hot Spring, Big Bend National Park, Brewster County, Texas, Russell McLester and Alan Cressler 1
Alan Cressler:
Cattail Canyon, Chisos Mountains, Big Bend National Park, Brewster County, Texas 1
