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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
Rhus glabra and Rhus typhina in winter