Zizia aptera
Yucca glauca
Yucca glauca
Young cottonwood stand at Garrison Reach, North Dakota
White Flowers
West sand bars on the Missouri River
Warren Keammerer standing in Melilotus
Warren Keammerer changing a flat tire
Warren Keammerer at Painted Woods Lake
W. Carter Johnson on Blossom Butte
Viola rugulosa
Viola pensylvanica
Viola papilionacea
Vernonia fasciculata
Verbena hastata
Vegetation on old cottonwood at Garrison Reach, North Dakota
Vegetation on fallen cottonwood
Vegetation in the Coteau Forest
Vegetation and Stream Colorado Rocky Mountains
Uvularia sessiliflora
Uvularia grandiflora
Uvularia grandiflora
Trillium cernuum
Trillium cernuum
Trillium cernuum
Treeline Colorado Rocky Mountains
Treeline Central Colorado Rockies
Tree Line James Peak Colorado
Tree Coring Missouri River Floodplain
Tradescantia bracteata
Tiny Primrose Alpine Rocky Mountains
Taraxacum officinale
Tall Grass Prairie Coteau
Sweetclover research on the Missouri River
Sunset on Missouri River
Sunflower Relative Colorado Rocky Mountains
Stream line vegetation in Colorado
Strawberry Plant Colorado Rocky Mountains
Stone stripes in Colorado
Stone stripes in Colorado
Stone nest in Colorado
Stipa comata
Stipa comata
Stina viridula
Sphaeralcea coccinea
Sphaeralcea coccinea
Sphaeralcea coccinea
Spartina pectinata
Snow Covered Forest and Mountains
Smilacina stellata
Smilacina stellata
Sisyrinchium montanum
Sieche Hollow State Park, South Dakota
Sieche Hollow in South Dakota
Sica Hollow State Park Nebraska and South Dakota
Shrankia (Mim)
Short Grass Plains Badlands National Park
Sheyenne River North Dakota Geology Field Trip
Shepherdia argentea
Shepherdia argentea
Senecio plattensis
Sedge Hummocks Colorado Alpine Tundra
Scirpus validus
Scirpus rubrotinctus
Sanguinaria canadensis
Sanguinaria canadensis
Sanguinaria canadensis
Sanguinaria canadensis
Sanguinaria canadensis
Sanguinaria canadensis
Sanguinarea and Uvularia
Sandstone buttes
Sandstone buttes
Salix catkins
Sagittaria in a Marsh
Sagittaria cuneata
Rosa woodsii
Rosa woodsii
Rosa woodsii
Rolling Field
Rocky Mountain National Park in Colorado
Rocky Fell Field Mountains of Colorado
Rocky Fell Field Colorado Rockies
Road Cut Exposing Glacial Till
River bank on the Missouri at Garrison Reach, North Dakota
Rhus radicans
Research stand on the Missouri River
Research stand on the Missouri River
Research stand on the Missouri River
Research stand on the Missouri River
Research stand on the Missouri River
Research stand on the Missouri River
Research stand on the Missouri River
Research stand on the Missouri River
Research stand on the Missouri River
Research stand on the Missouri River
Research stand on the Missouri River
Research stand on the Missouri River
Research stand on the Missouri River
Research stand on the Missouri River