1927 - 1929
Pinus flexilis, Lodgepole Pine, July 25, 1927
Lake, Pine and dead trees, July 26, 1927
Dead timber, Lodgepole Pine, July 26, 1927
Senecio, broad leaf, Monkshood, July 26, 1927
Lupinus, Lodgepole Pine, July 26, 1927
Lodgepole pine surface roots, July 27, 1927
Large Umbrellifera, Spruce, Pine, July 27 1927
Mertensia umbellifer, July 27, 1927
General view, Geranium, Senecio, July 27, 1927
Umbellifer, Willow, Fir, Pine, July 27, 1927
Top of Mt. Washburn, Lupine, etc. July 27, 1927
Top of Washburn, veg., July 27, 1927
Lichens, Pine, Storm, July 27, 1927
Beaver Dam with trees dead, Mertensia, July 27, 1927
Beaver dam, July 27, 1927
Linnea borealis, July 27, 1927
Roosevelt camp, Fireweed, July 27, 1927
Roosevelt camp, Eriogonum sulphurium, July 27, 1927
Old Aspen, fireweed, geranium, July 27, 1927
Senecia, fireweed, Douglas fir, July 27, 1927
Delphinium, fireweed, yarrow, July 27, 1927
Douglas Fir, Roosevelt Camp, July 28, 1927
Roosevelt camp, Douglas fir, July 28, 1827
Top of Mt., August 12, 1927
Lodgepole Pine, Willows, August 12, 1927
Artemisia trifida, Lodgepole pine, August 12, 1927
Beaver cut and aspens, August 12, 1927
Aspen, cut by beavers, August 12, 1927
Engelmann spruce, Lodgepole pine, August 12, 1927
Spruce, Pine, Juniper, sage, August 12, 1927
Soil bank, rock, chaparral type, January 1, 1929
Soil bank, rock, chaparral type, January 1, 1929
Juniper trimmed by deer, June 25, 1929
Juniper trimmed by deer, June 25, 1929
General view of Kanab Creek, Panorama, sparse growth of Juniper, sage, etc., June 25, 1929
General view of Kanab Creek, Panorama, sparse growth of Juniper, sage, etc., June 25, 1929
General view of meadow, Engelmann Spruce, Festuca arizonic, etc., June 26, 1929
General view of meadow, Aspen, Engelmann, spruce, grassland, June 26, 1929
View of meadow, spruce, grass, June 26, 1929
Meadow and hills, spruce, etc., June 26, 1929
Phlox douglasii, June 28, 1929
Antennaria, June 28, 1929
Detail of Antennaria, June 28, 1929
Agave, Pinus, July 5, 1929
Agave utahensis, Pinus edulis, July 5, 1929
Detail of Rosette of Agave, July 5, 1929
Agave utahensis, July 5, 1929
Penstemon, July 6, 1929
Penstemon, July 6, 1929
Penstemon, July 6, 1929
Grand Canyon, July 6, 1929
Grand Canyon, July 6, 1929
Agave utahensis, July 8, 1929
Agave utahensis, July 8, 1929
Desert with vegetation labeled, July 14, 1929
Pack rat in Juniper, July 14, 1929
Hymenoxys floribunda, July 14, 1929
Hymenoxys floribunda, July 14, 1929
Juniperus, July 14, 1929
Juniper, showing bark, July 14, 1929
East of Ash Fork, vegetation, July 14, 1929
Agave Parryi, detail, July 14, 1929
Agave Parryi, rodent injury, July 14, 1929
Agave Parryi, cliff rose, etc., July 14, 1929
Juniper, July 14, 1929
Juniperus utashensis, Quercus, oak, July 14, 1929
Fairy rings of Muhlenbergia, Bouteloua, Gutierrezia, July 14, 1929
Desert, Muhlenbergia, Bouteloua, July 15, 1929
En route, July 16, 1929
Camp, Quercus turbinella, Pinus, July 19, 1929
Quercus turbinella, Pinus, July 19, 1929
Nolina in flower, July 19, 1929
Nolina in flower, July 19, 1929
Parmelia conspersa, July 19, 1929
Oak, July 20, 1929
Echinocereus, July 22, 1929
Echinocereus, July 22, 1929
Echinocereus, July 22, 1929
Echinocereus, July 22, 1929
Quercus emoryi, July 22, 1929
Juglans major, July 22, 1929
Echinocereus, July 22, 1929
Chaparral, July 22, 1929
Pinus scopulorum, July 22, 1929
Pinus scopulorum, July 22, 1929
Chaparral, July 22, 1929
Quercus turbinella, Pinus, Rhus, etc., July 22, 1929
Short grass, Quercus, etc., July 22, 1929
Short grass, oak, July 22, 1929
Short grass, oak, July 22, 1929
Palms, July 26, 1929
Palms, July 26, 1929
Palms, July 26, 1929
Palms, July 26, 1929
Palms, July 26, 1929
Toads, July 28, 1929
Toads, July 28, 1929
Toads, July 28, 1929
Toads, July 28, 1929
Toads, July 28, 1929
Toads, July 28, 1929
Toads, July 28, 1929
Toads, July 28, 1929
Toads, July 28, 1929
Toads, July 28, 1929
Toads, July 28, 1929
Toads, July 28, 1929
Toads, July 28, 1929
Toad, July 28, 1929
Toad, July 28, 1929
Toad, July 28, 1929
Toad, July 28, 1929
Toad, July 28, 1929
Toad, July 28, 1929
Toad, July 28, 1929
Toad, July 28, 1929
Toad, July 28, 1929
Toad, July 28, 1929
Toad, July 28, 1929
Plowing under Sesbania, July 28, 1929
Plowing under Sesbania, July 28, 1929
Opuntia fulgida, Simmondsia, July 30, 1929
Simmondsia, Opuntia, Carnegiea, July 30, 1929
Fouquieria, Opuntia, etc., July 30, 1929
View of arboretum, July 30, 1929
Delphinium, August 8, 1929
Delphinium, August 8, 1929
Vegetaiton of valley, August 8, 1929
The valley, August 8, 1929
Dead fir, August 10, 1929
Festuca arizonica, etc. camp, August 10, 1929
Vegetation on mt., August 10, 1929
Dead cork bark fir, August 10, 1929
Engelmann spruce, dead, August 10, 1929
Pinus, spruce, aspen, meadow, August 10, 1929
Men on Mt., trees, August 10, 1929
Bark of Abies arizonica, August 10, 1929
Class, August 10, 1929
Class, August 10, 1929
Lecanora calcarea, August 10, 1929
Lichens, August 10, 1929
Muhlenbergia gracilis, etc., August 15, 1929
[John J.] Thornber, August 15, 1929
Ecology class 1929, August 15, 1929
Ecology class, August 15, 1929
Large leaf renunculus, Elk slip, October 18, 1929
Yellow pine, Engelmann spruce, aspen, October 18, 1929
Poa arizonica, Aspen, Engelmann spruce, October 18, 1929
Aspen, October 18, 1929
Hannigans Meadow, October 18, 1929
Sporobolus, Fragaris, gophers, October 18, 1929
Winn, Musgrave, Reddington, October 21, 1929
Winn, Musgrave, Reddington, October 21, 1929
Shantz, Musgrave, October 21, 1929
Men, October 21, 1929
Camp, October 21, 1929
Camp, October 21, 1929
Cotton field, October 22, 1929
Egyptian cotton, October 22, 1929
Cotton picking, October 22, 1929
Cotton picking, October 22, 1929
Cotton picking, October 22, 1929
Cotton picking, October 22, 1929
Hilaria rigida, October 28, 1929
Hilaria rigida, October 28, 1929
Kickpatrick, Layton, October 29, 1929
Kickpatrick, Layton, October 29, 1929
Hill, October 29, 1929
Mann, McIntyre, November 1, 1929
Gov. [John C.] Phillips, McIntyre, November 2, 1929
[John C.] Phillips, McIntyre, November 2, 1929
Edge, November 5, 1929
Edge, November 5, 1929
Yellow pine, November 5, 1929
Erosion of shad land, November 5, 1929
Erosion, November 5, 1929
Over shad, air photo, November 6, 1929
Over Grand Canyon, November 5, 1929
Edge, November 5, 1929
Forest south of Canyon, November 5, 1929
Yellow pine, November 5, 1929
Yellow pine, November 5, 1929
Yellow pine, November 5, 1929
Landing field, November 5, 1929
Over Grand Canyon, November 8, 1929