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Spiranthes cernua (Coccineorchis cernua)
Spiranthes gracilis
Spiranthes gracilis
Spireae salicifolia
Spireae salicifolia
Spirodela polyrhiza
Spirodela polyrhiza, near view
Spirogya
Spirogyra
Spirogyra, fruiting
Spirogyra, vegetative cell
Split Rock Lighthouse
Split Rock Lighthouse, near view
Split Rock Lighthouse on the North Shore of Lake Superior
Spongy oak-apple gall of Quercus coccinea
Spotted Mushroom, close-up
Spring Creek Canyon
Spring Rose Gall of Wild Rose
Spring Wildflowers near the Cannon River
Spruce hen on the Isabella River near Bald Eagle Lake
Spruce swamp along Ely Road near Finland
Spruce Swamp near Island Lake in Northome
Spruce swamp on the North Shore near the border of Minnesota and Canada
Spruces, White and Blue, leaves
S. stellata
S. stellata
Stachys palustris
Stachys palustris
Staminate catkins of the Populus deltoides
Staminate flowers of Populus deltoides, enlarged
Staphylea trifolia leaf
Staphylea trifolia, new view, cut to show chambers
Staphylea trifolia on branches
Starfish at low tide
Starfish at low tide
St. Croix gorge and bridge near Taylor's Falls
Steironema ciliatum (Lysimachia ciliata)
Stem of Tree-fern, close up
Stem of Tree-fern, close up
Stemonitis
Sticta oregana
Sticta oregana
Sticta pulmonaria
St. Louis River in Jay Cooke State Park
St. Louis River in Jay Cooke State Park
St. Louis River in Jay Cooke State Park
St. Louis River in Jay Cooke State Park
Stone-crop leaves showing propagation by leaf
Stream Below Twin Falls, Yohoo Valley
Streptopus roseus (Streptopus lanceolatus)
Streptopus roseus (Streptopus lanceolatus)
Strobilomyces strobilaceus
Sturdy Quercus macrocarpa (Quercus iberica) in the sand dunes in Anoka County
Sturdy Quercus macrocarpa (Quercus iberica) on sand dunes
Sulpher bracket
Sulpher bracket
Sulpher bracket
Sulpher bracket
Sulpher bracket, close up
Sulphur Mountain
Summer lodge of the Indians on Lake Isabella
Sun and shade leaves
Sunflower leaf arrangement
Sunrise from Barn Bluff in Red Wing
Sunset on Bald Eagle Lake
Sunset on Lake Isabella
Sunset on Lake Isabella
Sunset on Lake Itasca near Peace Pipe Springs
Sunset on Lake Itasca near Peace Pipe Springs
Sunset on Lake Itasca near Peace Pipe Springs
Sunset Scene over Bald Eagle Lake
Surf dashing over the rocks, showing the force of wave action
Swamp Laurel
Swamp milkweed shedding seeds
Swolen Twig gall of Salix
Swole twig gall of Populus
Sydesmon
Sydesmon
Symphoricarpos occidentalis
Symphoricarpos racemosus leaf and fruit
Symphyotrichum novae-angliae
Symplocarpus foetidus, near view
Syndesmon, close up
Syringa persica
Syringa vulgaris
Syringa vulgaris leaf
Syringa vulgaris leaf
Takakkaw Falls, Yoho Valley
Tall White Pines and Birches
Tamarack swamp at Sucker Lake showing yellow lady's slipper
Tanacetum vulgare
Tanacetum vulgare
Taraxacum fruit
Taraxacum officinale
Taraxacum officinale
Teloschistes candelarius on basswood
Teloschistes polycarpus
Text, ending slide for presentation
Text, end slide for presentation
Thalictrum