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Ulmus rubra leaves and fruit
Tricholoma personatum (Lepista personata)
Tricholoma personatum (Lepista personata)
Trees uprooted in the Indiana sand dunes
Tilia trunk and bark
St. Louis River in Jay Cooke State Park
St. Louis River in Jay Cooke State Park
St. Louis River in Jay Cooke State Park
Stem of Tree-fern, close up
Stem of Tree-fern, close up
Split Rock Lighthouse on the North Shore of Lake Superior
Solanum dulcamara flower and fruit
Slippery Elm trunk and bark on the Minnesota River
Rock cliffs on the St. Louis River at Jay Cooke Park
Red Oak trunk
Quercus rubra leaves and acorn
Quercus rubra leaves and acorn
Quercus macrocarpa (Quercus iberica) trees on campus near the old library
Quercus macrocarpa (Quercus iberica) trees on campus near the Mines building
Quercus macrocarpa (Quercus iberica) trees on campus near the Mechanical Arts building
Quercus macrocarpa (Quercus iberica) trees on campus near the Chemistry lab
Quercus macrocarpa (Quercus iberica) tree on East River Road near Anoka
Quercus macrocarpa (Quercus iberica) leaves
Quercus macrocarpa (Quercus iberica) leaves
Quercus macrocarpa (Quercus iberica) leaves
Quercus macrocarpa (Quercus iberica) and Salix in the spring
Quercus coccinea leaves
Quercus coccinea leaf and acorns
Quercus alba leaves
Quercus alba leaves
Quercus alba leaves
Porella on black ash
Populus tremuloides leaf
Populus tremuloides leaf
Populus nigra leaf
Populus nigra leaf
Populus leaves
Populus leaves
Populus alba leaf and Silver Poplar leaf
Polypodium vulgare, home garden
Polypodium vulgare
Pollination in Epilobium, chart, diagram
Phegopteris (Dryopteris)
Phegopteris (Dryopteris)
Petrified Wood
Petrified Wood
Petrified Wood
Opuntia and Mamillaria cacti in home garden
Opuntia and Mamillaria cacti in home garden
Northern Pine Oak leaves and fruit