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1991 - 200 of 209916 results
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
Rhus glabra and Rhus typhina in winter
Rhus glabra in flower
Rhus glabra leaf
Rhus toxicodendron
Rhus toxicodendron, fruit, in winter condition
Rhus toxicodendron, Leaves and fruit, close up
Rhus typhina
Rhus typhina in winter condition
Rhus typhina in winter condition, silhouette of branches and fruit
Rhus typhina leaf
Rhus typhina leaf
Rhus typhinia
Rhus vernix
Rhus vernix (Sorindeia madagascariensis)
Ribes aureum leaf
Ribes cynosbati
Ribes cynosbati
Ribes cynosbati leaf
Ribes cynosbati leaf
Ribes floridum (Ribes americanum)
Ribes floridum (Ribes americanum) leaf
Ribes gracile
Ribes oxyacanthoides
Ribes vulgare (Ribes rubrum)
Riccia fluitans on soil
Riccia fluitans on soil
Ricciocarpos natans floating
Ricciocarpos natans floating
Rice Creek in April
Rinodina oreina
Rinodina oreina
Rinodina oreina
Rinodina oreina
Rinodina oreina on red quartzite
Rinodina oreina on red quartzite
Rinodina oreina on red quartzite
Rinodina oreina on red quartzite
Ripe fruits of Rhus glabra
Ripe pods of Oenothera macrocarpa
Ripe pods of Oenothera macrocarpa
Ripe pods of the Garden Poppy
Ripe pods of the Tulip
River emerging from Illecillewaet Glacier
Road through the Spruce swamp, Finland-Ely road
Road through the Spruce swamp near Grand Marais and the border
Road through Wooded Mountain Slope
Robinia pseudoacacia leaf
Rock cliff on Clearwater Lake, 600 feet high
Rock cliff on the St. Croix near Stillwater
Rock cliffs at Grand Marais
Rock cliffs at Grand Marais
Rock cliffs on the St. Louis River at Jay Cooke Park
Rock ledge and the Point at Grand Marais
Rock Lichen at Grand Marais
Rock Lichens, Parmelia
Rock Lichens, Parmelia
Rock outcrop at Ortonville
Rocks and forest near Taylor's Falls
Rocks at Granite Falls
Rock vegetation on the point near Grand Marais
Rock vegetation on the point near Grand Marais
Rocky banks of the St. Croix River at Taylor's Falls
Rocky bluffs in between Red Wing and Lake City
Rocky cliff on the bank of the St. Louis River at Jay Cooke Park