Carter Johnson at Sica Hollow State Park in South Dakota
Missouri River Field Research
Carter Johnson Doctorate Field Research
Forest Understory, Warren Keammerer
Tree Coring Missouri River Floodplain
Itasca State Park
Itasca State Park Bog D
Larch Trees of Bog D, Itasca State Park
Aerial view of Bog D
North Dakota State University Ecology Class Itasca State Park Bog D
Pitcher Plants and Sun Dews, Bog D
Badlands National Park
Badlands National Park
Badlands National Park
Badlands National Park
Badlands National Park
Badlands National Park
Short Grass Plains Badlands National Park
Sheyenne River North Dakota Geology Field Trip
Devils Lake before Flooding
North Dakota Farm Effects of Grazing
Hummocky Ground, North Dakota Farm
Road Cut Exposing Glacial Till
Ancient Shoreline Marked by Exposed Rocks
Glacial Till, Central North Dakota
Glacial Till Exposed at Road Cut
Rolling Field
Bristlecone Pine
Snow Covered Forest and Mountains
Marty Burkel and Edmund Hubbard
Sica Hollow State Park Nebraska and South Dakota
James Peak, Colorado
Alpine Tundra Plant (Erysimum nivale) Colorado
Alpine Tundra Plant (Lloydia cerotina) Colorado Rockies
Alpine Plant Colorado Rocky Mountains
Alpine Plant (Geum Rossi) Colorado Rocky Mountains
Strawberry Plant Colorado Rocky Mountains
Meadow Plant, Colorado Rocky Mountains
Parasitic Plant Forest of Colorado Rockies
Cushion Plant, Alpine, Colorado Rockies
Buttercup Alpine Colorado Rockies
Meadow Plant Colorado Rocky Mountains
Buttercup Through Snow, Rocky Mountain National Park
Alpine Tundra near Niwot Ridge Colorado Rocky Mountains
Black Sedge Alpine Colorado Rockies
Doll's Eyes, Rocky Mountain Colorado
Alpine Tundra Plant Rocky Mountain Colorado
Alpine Tundra Colorado Rocky Mountains
Niwot Ridge, Colorado Alpine, Rocky Mountains
Sedge Hummocks Colorado Alpine Tundra
Andrews Glacier and Lake Colorado Rocky Mountains
Andrews Glacier Colorado Rocky Mountains
Rocky Fell Field Mountains of Colorado
Treeline Colorado Rocky Mountains
Vegetation and Stream Colorado Rocky Mountains
Rocky Fell Field Colorado Rockies
Colorado Rockies
Colorado Rockies near Estes Park
Treeline Central Colorado Rockies
Alpine Tundra and Lake near Timberline Colorado Rockies
Evergreen Forests in Colorado Rocky Mountains
Landscape View of Colorado Rockies
Flag-Form Trees Colorado Rockies
Landscape View, Colorado Rockies
Dr. Harold Lutz Lecturing University of Colorado Mountain Ecology Class
Famous Alpine Ecologist John Marr Lecturing University of Colorado
Dr. John Marr Lecturing to Alpine Ecology Class
Dr. Paul Kilburn Summer Instructor of Mountain and Alpine Ecology Classes
Campground near Estes Park, Colorado
Andrews Glacier and Valley Rocky Mountains Colorado
Reflective Tarn Downslope of Andrews Glacier
Andrews Glacier
White Flowers
Arctic and Alpine Valuable Plant for Science
Orchid Found in Evergreen Forests Colorado Rocky Mountains
Primroses Meadows of Colorado Rocky Mountains
Columbine, Colorado State Flower
Over mature Columbine, Colorado State Flower
Mountain Laurel
Sunflower Relative Colorado Rocky Mountains
Flag-Form Trees near Timberline Colorado Rockies
Buttercups in Melting Snow, Colorado
Cushion Plant, Colorado Alpine
High Mountain Alpine Plant
Old Man of the Mountain Sunflower (Hymenoxys Grandiflora)
Alpine Willow Rocky Mountains of Colorado
Dwarf Willow Alpine Colorado Rockies
Alpine Plant Colorado Rockies
Tiny Primrose Alpine Rocky Mountains
Alpine Clover Colorado Rockies
Forget-Me- Not Cushion Plant, Colorado Rockies
Pika above Timberline Rocky Mountain National Park
Barren, Rocky Slope Alpine Colorado Rockies
Bristlecone Pine Krummholz on James Peak Colorado
Bristlecone Pine near Timberline James Peak, Colorado
Close-up of Bristlecones Pine Krummholz
Bristlecone Pine Krummholz James Peak, Colorado
Tree Line James Peak Colorado
Bristlecone Pine Krummholz James Peak, Colorado
Bristlecone Pine Krummholz James Peak, Colorado