1931
Stem of Cereus giganteus, February 22, 1931
Top of saguaro, February 22, 1931
Saguaro, Mr. Bridge, Cats Claw, February 22, 1931
Saguaro, Palo Verde, Encelia, February 22, 1931
Cereus giganteus, faciated top, February 22, 1931
Cereus giganteus, faciated top, February 22, 1931
Cats Claw, Encelia, Saguaro, etc., February 22, 1931
Saguaro, Palo Verde, Mr. Bridges, February 22, 1931
Saguaro, Cats Claw, Palo Verde, February 22, 1931
Saguaro, Cats Claw, Palo Verde, February 22, 1931
Saguaro, Cats Claw, Palo Verde, February 22, 1931
Saguaro blown over, February 22, 1931
Saguaro blown over, February 22, 1931
General view of Forest, February 22, 1931
General view of Forest, February 22, 1931
Mr. Bridge, February 22, 1931
Good shot of forest, February 22, 1931
Single large saguaro, Febraury 22, 1931
Cereus giganteus, old dead tree, February 22, 1931
Saguaro blown down, wet soil, Febraury 22, 1931
Saguaro roots, wet soil, February 22, 1931
Cactus garden, April 1, 1931
Grassland and Quercus Emoryi, December 5, 1931
Grassland and Quercus Emoryi, December 5, 1931
Grassland and Quercus Emoryi, December 5, 1931
Grasses, vegetation, December 5, 1930
Grasses, vegetation, December 5, 1930
Vegetation named of grasses, Hill, Decemebr 6, 1931
Detail of Hilaria, Acacia, Prosopis, December 5, 1931
Echinocereus detail, December 6, 1931
Lemairocereus Thurberi, etc., December 6, 1931
Lemairocereus Thurberi, etc., December 6, 1931
Lemairocereus thurberi, December 6, 1931
Bunch grass, vegetation named, December 6, 1931
Open grassland, Decemebr 6, 1931
Open grassland, Decemebr 6, 1931
Prairie vegetation, Mts. in back, December 6, 1931
Prairie vegetation, Mts. in back, December 6, 1931
Hilaria, Prosopis, Acacia, December 6, 1931
Hilaria, Prosopis, Acacia, December 6, 1931
Celtis, Encelia, Bouteloua, etc., December 6, 1931
Celtis, Encelia, Bouteloua, etc., December 6, 1931
Copal tree, Ironwood, Encelia, December 6, 1931
Lunch, People, December 7, 1931
Lophocereus schottii, December 7, 1931
Lophocereus schottii, December 7, 1931
Lemairocereus thurberi, December 7, 1931
Hilaria, Bouteloua, Ironwood, etc., December 7, 1931
Pachycereus pringlei, December 7, 1931
Detail of Pachycereus, December 7, 1931
Detail of Pachycereus, December 7, 1931
Seri Indians, December 8, 1931
Seri Indians, December 8, 1931
Seri Indians, December 8, 1931
Seri Indians, December 8, 1931
Seri Indians, December 8, 1931
Seri Indians, December 8, 1931
Seri Indians, December 8, 1931
Seri Indians, December 8, 1931
Seri Indians, December 8, 1931
Seri Indians, December 8, 1931
Frankenia, Ocotillo, Gutierrezia, etc., December 9, 1931
Pachycereus pringlei, Decemebr 9, 1931
Pachycereus pringlei, Decemebr 9, 1931
Pachycereus pringlei, Decemebr 9, 1931
Pelican Island, December 9, 1931
Pelican Island, December 9, 1931
Shore of Pelican Is., December 9, 1931
Tree, Covillea, Octotillo, Ironwood, December 9, 1931
Tree, Covillea, Octotillo, Ironwood, Ocean in back, December 9, 1931
Island at Keno Bay, Fishery, December 9, 1931
Pelican Island, December 9, 1931
Pelican Island, December 9, 1931
Pelican Island, December 9, 1931
Pelican Island, December 9, 1931
Pelican Island, December 9, 1931
Pelican Island, December 9, 1931
Stages in development of ocotillo, December 9, 1931
Stages in development of ocotillo, December 9, 1931
Jatropha, Schinus like, etc., December 9, 1931
Vegetation at Keno Bay, December 9, 1931
Vegetation at Keno Bay, December 9, 1931
Pelican Island, December 9, 1931
Birds in air, December 9, 1931
Birds in air, December 9, 1931
Birds in air, December 9, 1931
Birds in air, December 9, 1931
Vegetation, wind effect, December 9, 1931
Vegetation, wind effect, December 9, 1931
Lamairocereus thurberi, December 10, 1931
Lamairocereus thurberi, December 10, 1931
Roots of Lamairocereus thurberi, December 10, 1931
Gaertneria, Pachycereus, etc., December 10, 1931
Pachycereus pringlei, December 10, 1931
Encelia, mesquite, etc., December 10, 1931
Megaocereus, December 10, 1931
Megaocereus, December 10, 1931
Megaocereus, December 10, 1931
Encelia, Jatopha, Covillea, etc., December 11, 1931
Opuntia fulgida, December 11, 1931
Opuntia fulgida, December 11, 1931
Opuntia fulgida, December 11, 1931
Lophocereus schottii, December 11, 1931
Opuntia fulgida, December 11, 1931
Opuntia fulgida, December 11, 1931
Opuntia fulgida, December 11, 1931
Opuntia fulgida, December 11, 1931
Opuntia fulgida, December 11, 1931
Ceiba tree, vegetation named, December 11, 1931
Hermosillo, December 11, 1931
Hermosillo, December 11, 1931
Grandstand, December 11, 1931