Alan Cressler:
Agave Xglomeruliflora, Cattail Canyon, Chisos Mountains, Big Bend National Park, Brewster County, Texas 4
Alan Cressler:
Agave neomexicana, Big Canyon, Guadalupe Mountains, Lincoln National Forest, Eddy County, New Mexico 4
Alan Cressler:
Allionia incarnata, Tributary of Tornillo Creek, Big Bend National Park, Brewster County, Texas 2
Alan Cressler:
Apis mellifera scutellata, East Beach, Apffel Park, Galveston Island, Galveston County, Texas 1
Alan Cressler:
Biface, Tributary of Tornillo Creek, Big Bend National Park, Brewster County, Texas 2
Alan Cressler:
Guadalupe Mountains, Big Canyon, Lincoln National Forest, Eddy County, New Mexico 1
Alan Cressler:
bitter lake national wildlife refuge, chaves county, new mexico 1
Alan Cressler:
bottomless lakes state park, figure eight lake, chaves county, new mexico 1
Alan Cressler:
Bottomless Lakes State Park, Figure Eight Lake, Chaves County, New Mexico 2
Alan Cressler:
Bottomless Lakes State Park, Lazy Lagoon, Chaves County, New Mexico 1
Alan Cressler:
Burro Mesa Pouroff, Big Bend National Park, Brewster County, Texas 2
Alan Cressler:
butterowe bayou, galveston island state park, galveston county, texas 1
Alan Cressler:
butterowe bayou, galveston island state park, galveston county, texas 2
Alan Cressler:
Carlsbad Caverns, Carlsbad Caverns National Park, Eddy County, New Mexico 12
Alan Cressler:
Chisos Mountains, from Santa Elena Canyon, Rio Grande, Big Bend National Park, Brewster County, Texas and Parque Nacional Canon de Santa Elena, Chihuahua, Mexico 1 1
Alan Cressler:
Dallas skyline, from North Hampton Road Bridge, Dallas, Dallas County, Texas 1
Alan Cressler:
Echinocereus triglochidiatus, White Mule Canyon, Guadalupe Mountains, Lincoln National Forest, Eddy County, New Mexico 1
Alan Cressler:
El Capitan, Guadalupe Mountains National Park, Culberson County, Texas 10
Alan Cressler:
El Capitan, Guadalupe Mountains National Park, Culberson County, Texas 2
Alan Cressler:
El Capitan, Guadalupe Mountains National Park, Culberson County, Texas 3
Alan Cressler:
Eremobates species, Devils River State Natural Area, Val Verde County, Texas 1
Alan Cressler:
Ernst Tinaja, Boquillas Formation, and Buda Limestone, Late Cretaceous age, Cuesta Carlota, Big Bend National Park, Brewster County, Texas 1
Alan Cressler:
fishing pier, galveston island, galveston county, texas 1
Alan Cressler:
Gaillardia pulchella, Pelican Island, Galveston Bay, Galveston County, Texas 1
Alan Cressler:
Guadalupe Peak, Guadalupe Mountains National Park, Culberson County, Texas 1
Alan Cressler:
Guadalupe Mountains, Gunsight Canyon, Lincoln National Forest, Eddy County, New Mexico, Jim Burke 4
Alan Cressler:
Hueco Tanks, Hueco Tanks State Historical Park, North Mountain, El Paso County, Texas 1
Alan Cressler:
Hueco Tanks, Hueco Tanks State Historical Park, North Mountain, El Paso County, Texas 2
Alan Cressler:
Johnson Creek, and the Rangers Ball Park, Dr. Robert N. Cluck Linear Park, Arlington Sports Complex, Arlington, Tarrant County, Texas 1
Alan Cressler:
Lampetis drummondi, Santa Elena Canyon, Big Bend National Park, Brewster County, Texas 1
