Colorado Rockies near Estes Park
Columbine, Colorado State Flower
Columnar juniper
Columnar juniper
Columnar juniper
Columnar juniper
Columnar juniper
Convolvulus arvensis
Convolvulus sepium
Cornus stolonifers
Coteau Forest
Cottonwood forest at Garrison Reach, North Dakota
Crataegus rotundifolia
Cushion Plant, Alpine, Colorado Rockies
Cushion Plant, Colorado Alpine
Cystopteris fiddleheads
Cystopteris fragilis
Dead myrtle warbler
Decadent elm tree at Garrison Reach of the Missouri River, North Dakota
Decorah Shale Stratigraphy
Desmodium canadense
Devils Lake before Flooding
Dicentra cucullaria
Dicentra cucullaria
Dicentra cucullaria
Doll's Eyes, Rocky Mountain Colorado
Dr. Harold Lutz Lecturing University of Colorado Mountain Ecology Class
Dr. John Marr Lecturing to Alpine Ecology Class
Dr. Paul Kilburn Summer Instructor of Mountain and Alpine Ecology Classes
Dwarf Willow Alpine Colorado Rockies
Echinacea angustifolia
Echinacea angustifolia
Echinocystis lobata
Eleagnus angustifolia
Eleagnus angustifolia
Emergent cottonwood at Garrison Reach of the Missouri River, North Dakota
Emergent cottonwood at Garrison Reach of the Missouri River, North Dakota
Emergent cottonwood at Garrison Reach of the Missouri River, North Dakota
Erigeron glabellus
Evergreen Forests in Colorado Rocky Mountains
Fall Celatrus at research stand on the Missouri River
Famous Alpine Ecologist John Marr Lecturing University of Colorado
Ferns and mosses
Flag form trees in Colorado
Flag-Form Trees Colorado Rockies
Flag-Form Trees near Timberline Colorado Rockies
Floodplain forest research on the Missouri River
Floodplain forest research on the Missouri River
Floodplain forests on the Missouri River
Floodplain marsh at Garrison Reach, North Dakota
Floodplain marsh at Garrison Reach, North Dakota
Floodplain marsh at Garrison Reach, North Dakota
Floodplain marsh at Garrison Reach, North Dakota
Floodplain understory at Garrison Reach of the Missouri River, North Dakota
Forest Understory, Warren Keammerer
Forget-Me- Not Cushion Plant, Colorado Rockies
Fossils on the Iowa River
Fossils on the Iowa River
Fungi sulphur mushrooms
Fungus mushroom
Fungus on fir tree in Colorado
Garrison Reach of the Missouri River in North Dakota
Garrison Reach of the Missouri River in North Dakota
Garrison Reach of the Missouri River in North Dakota
Gaura coccinea
Geum triflorum
Geum triflorum
Glacial Till Exposed at Road Cut
Glacial Till, Central North Dakota
Glacier-formed cirque in Colorado
Glacier-formed cirque in Colorado
Glacier-formed cirque in Colorado
Glyceria grandis
Hayland near the Missouri River
Hayland near the Missouri River
Helianthus annuus
Hieraciium canadense
High Mountain Alpine Plant
Hole in a cottonwood tree
Hummocky Ground, North Dakota Farm
Ice damaged trees on Missouri River from 1952 flood
Itasca State Park
Itasca State Park Bog D
J. Dodd and B. Lauenroth, graduate students at NDSU
James Peak in Colorado
James Peak in Colorado
James Peak in Colorado
James Peak, Colorado
Janet Johnson on Blossom Butte
Krummholtz on James Peak, Colorado
Krummholtz on James Peak, Colorado
Krummholtz on James Peak, Colorado
Landscape View of Colorado Rockies
Landscape View, Colorado Rockies
Larch Trees of Bog D, Itasca State Park
Large American Elms at Garrison Reach, North Dakota
Large ash tree
Large Cottonwood tree
Large Cottonwood tree
Liana grape vines on ash trees at Garrison Reach, North Dakota