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1996 - 200 of 210480 results
Quercus alba leaves
Quercus alba, one mile north of the Agricultural College
Quercus alba, one mile north of the Agricultural College
Quercus coccinea leaf and acorns
Quercus coccinea leaves
Quercus coccinea staminate catkins
Quercus coccinea staminate flowers and young acorns
Quercus macrocarpa (Quercus iberica) and Salix in the spring
Quercus macrocarpa (Quercus iberica) at the old Greenhouse showing light relations
Quercus macrocarpa (Quercus iberica) bark and trunk
Quercus macrocarpa (Quercus iberica) bark and trunk
Quercus macrocarpa (Quercus iberica) bark and trunk, near view
Quercus macrocarpa (Quercus iberica) cross section showing annual rings, near view
Quercus macrocarpa (Quercus iberica) cross section showing annual rings, near view
Quercus macrocarpa (Quercus iberica) half buries in moving sands
Quercus macrocarpa (Quercus iberica) in moving sand dune
Quercus macrocarpa (Quercus iberica) knee deep in sand dunes
Quercus macrocarpa (Quercus iberica) leaves
Quercus macrocarpa (Quercus iberica) leaves
Quercus macrocarpa (Quercus iberica) leaves
Quercus macrocarpa (Quercus iberica) nearly submerged by drifting sands
Quercus macrocarpa (Quercus iberica) nearly submerged by drifting sands, near view
Quercus macrocarpa (Quercus iberica) on 15th Avenue near Folwell Hall
Quercus macrocarpa (Quercus iberica) on the Edina Shakopee Road
Quercus macrocarpa (Quercus iberica) on the Edina Shakopee Road
Quercus macrocarpa (Quercus iberica) on the University campus near the main gate
Quercus macrocarpa (Quercus iberica) probably planted by squirrels
Quercus macrocarpa (Quercus iberica) probably planted by squirrels
Quercus macrocarpa (Quercus iberica) probably planted by squirrels
Quercus macrocarpa (Quercus iberica) staminate flowers
Quercus macrocarpa (Quercus iberica) tree in the spring on East River Road near Anoka
Quercus macrocarpa (Quercus iberica) tree in the spring on East River Road near Anoka
Quercus macrocarpa (Quercus iberica) tree near the Chemistry building on the University campus
Quercus macrocarpa (Quercus iberica) tree on East River Road near Anoka
Quercus macrocarpa (Quercus iberica) trees on campus near the Chemistry lab
Quercus macrocarpa (Quercus iberica) trees on campus near the Mechanical Arts building
Quercus macrocarpa (Quercus iberica) trees on campus near the Mines building
Quercus macrocarpa (Quercus iberica) trees on campus near the old library
Quercus rubra leaves and acorn
Quercus rubra leaves and acorn
Quercus velutina in the spring
Quereus bicolor
Quereus bicolor
Quill reed against a dark background
Radicula nasturtium-aquaticum (Nasturtium officinale)
Ranger's cabin west of the old boundary
Ranunculas acris
Ranunculus
Ranunculus
Ranunculus acris
Ranunculus acris
Ranunculus aquatilis
Ranunculus aquetilis and tricophyllus
Ranunculus aquetilis and tricophyllus, near
Ranunculus circinatus (Batrachium circinatum)
Ranunculus delphinifolius in a field
Ranunculus delphinifolius in a field
Ranunculus delphinifolius in a field (Ranunculus flabellaris)
Ranunculus delphinifolius in a field (Ranunculus flabellaris)
Ranunculus delphinifolius ((Ranunculus flabellaris))
Ranunculus fascicularis
Ranunculus fascicularis
Ranunculus fascicularis
Ranunculus fascicularis
Ranunculus fascicularis
Ranunculus septentrionalis
Ranunculus septentrionalis
Rapids and falls of the northern Kawishiwi River
Rapids and short portage on the Isabella River
Rapids of the North Kawishiwi River showing the river above camp number one
Rapids on the Isabella River near the Bald Eagle Camp
Recently plowed up shortgrass prairie
Recently plowed up shortgrass prairie on private land south of Keota, Colorado
Recently plowed up shortgrass prairie south of Keota, Colorado
Red banded bullet gall of a Red oak
Red berried elder leaf
Red berried elder leaf
Red-berried Elder, mutilated, along West River Road
Red-berried Elder, mutilated, along West River Road
Red Cedar leaf
Red Oak trunk
Red tinted Mountain Plover eggs
Red tinted Mountain Plover eggs
Redwood highway
Redwood Highway, Richardson's Grove
Redwoods at Weott, California
Redwoods in Richardson's Grove
Redwood Tree House
Redwood Tree House
Reindeer moss, Cladonia
Resting near the summit of Mount Sifton
Results of an avalanche near Glacier
Revegetation of an old Blow-out
Rhamnus cathartica leaf and fruit
Rheum officinale, near view of flowers
Rheum officinale, whole plant
Rhus diversiloba
Rhus diversiloba (Toxicodendron diversilobum)
Rhus flower nectaries
Rhus glabra