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Scarlet cup, Peziza
Scirpus cyperinus
Scirpus validus
Scirpus validus
Scouring action of Glacier, one side of the bank on Mount Rogers
Scrophularia leporella
Scrophularia leporella
Scrophularia marlyandica, pods open at top
Scrophularia nectaries, illustration
Scutellaria galericulata
Sea Palms, the main building at the Minnesota Seaside Station
Sea urchins and many-rayed Starfish, low tide
Secondary dam below a bigger dam on Beaver Creek along the Isabella River
Secondary outlet of Gabbro Lake, home of the deer
Section of fallen Redwood in Richardson's Grove
Seed pods of Asclepias
Seed pods of Datura
Seeds of Pinus strobus (Strobus strobus)
Selaginella
Selaginella life cycle diagram
Selaginella rupestris (Selaginella sellowii)
Selaginella rupestris (Selaginella sellowii)
Selaginella rupestris (Selaginella sellowii)
Selaginella rupestris (Selaginella sellowii)
Senecio aureus (Packera aurea)
Sequoia gigantea (Sequoiadendron giganteum)
Sequoia gigantea (Sequoiadendron giganteum)
Setaria glauca (Cenchrus americanus)
Setaria viridis
Setaria viridis
Seven Mountain Plovers
Shale beds, Fucoids, Twin City Brick Company
Shale beds, Twin City Brick Company
Sheep grazing in the grasslands of Montana
Sheep grazing in the grasslands of Montana
Shelf Fungus on Alder, Daedalea unicolor (Cerrena unicolor)
Shelf Fungus on Birch, Polystictus pergamenus (Trichaptum biforme)
Shingle
Shore vegetation on the upper Baptism River
Shortgrass flowers
Shortgrass flowers
Shortgrass yellow flowers
Short tentacled sea anemone in a tide pool
Show Orchid, nearer view
Showy Lady Slipper, clump in Cambridge swamp
Siberian Pea Tree
Side of large Blow-out, vegetation advancing
Side of old Blow-out, undermining, turrets, etc.
Side of recent Blow-out, vegetation beginning
Silphium perfoliatum