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bogyawn: Tytoona Cave Entrance, Tytoona Cave Nature Preserve Area, National Speleological Society, Blair County Pennsylvania 3
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bogyawn: Toxicodendron vernix, Bethlehem Fen, Lawrence County, Pennsylvania 1
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bogyawn: Cave Formations, Upper Passage, Alexander Cavern, Mifflin County, Pennsylvania 28
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bogyawn: Grave Creek Mound, Adena Culture, Woodland Period, Marshall County, West Virginia 4
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bogyawn: Horseshoe Falls, Niagara River, from Canadian side, Ontario, Canada, and Niagara County, New York 16
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bogyawn: Suwannee Limestone, Madison Blue Spring, Madison Blue Spring State Park, Madison County, Florida 7
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bogyawn: Kettle Bog East, Kettle Peatlands, Warren County, Pennsylvania 1
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bogyawn: Lake Pleasant, Decodon verticillatus rainbow, Lake Pleasant Conservation Area, Western Pennsylvania Conservancy, Erie County, Pennsylvania 4
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bogyawn: Parnassia glauca, Seepage Fen, Lawrence County, Pennsylvania 9
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bogyawn: Hymenocallis coronaria, Hatchet Creek, Coosa County, Alabama 9
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bogyawn: Sideling Hill Barren, Appalachian Shale Barren Community, Sideling Hill Creek, Foreknobs Formation, Devonian Age, Sideling Hill Creek Conservation Area, Bedford County, Pennsylvania 10
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bogyawn: Tomato Mountain Site, Prehistoric Pictographs, Sewanee Style, Alabama, Alan Cressler 18
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bogyawn: Cave Formations, Upper Passage, Alexander Cavern, Mifflin County, Pennsylvania 26
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bogyawn: Typha latifolia, Great Lakes Sand Spit, Presque Isle, Presque Isle State Park, Erie County, Pennsylvania
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bogyawn: Boiling Springs Hollow Run, Hart County, Kentucky 1
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bogyawn: Paxistima canbyi, habitat, Juniata Barrens, Bedford County, Pennsylvania 8
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bogyawn: Dryopteris intermedia (left), Dryopteris hyb. nov. (center), Dryopteris marginalis (right), Jackson County, Alabama 1 (black and white)
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bogyawn: Stephens Gap Cave, Stephens Gap Callahan Cave Preserve, Southeastern Cave Conservancy, Jackson County, Alabama 3
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bogyawn: Cypripedium reginae, Seepage Slope Fen, Glaciated Zone, Pennsylvania 1
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bogyawn: Meadow Run, Ohiopyle State Park, Fayette County, Pennsylvania 7
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bogyawn: Kettle Peatlands, Kettle Bog East, Warren County, Pennsylvania 2
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bogyawn: Crotalus horridus, Limestone Run, Fayette County, Pennsylvania 2
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bogyawn: Aurora Borealis, Class G4 Geomagnetic Storm of 10 and 11 October 2024, from Lake Arthur, Moraine State Park, Butler County, Pennsylvania 21
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bogyawn: Old Growth Hemlock Cove Forest, Forest Cathedral Natural Area, Cook Forest State Park, Clarion County, Pennsylvania 17
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bogyawn: Caulophyllum giganteum, Wolf Creek, Miller Woods Nature Preserve, Butler County, Pennsylvania 4
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bogyawn: Goniopteris sclerophylla (left), Goniopteris hyb. nov. (center), Goniopteris reptans (right), Subtropical Hardwood Hammock, Miami-Dade County, Florida 2
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bogyawn: Symplocarpus foetidus, Plain Grove Fens Natural Area, Western Pennsylvania Conservancy, Lawrence County, Pennsylvania 1
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bogyawn: Mesophytic forest, Enlow Fork Natural Area, Greene County, Pennsylvania 1
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bogyawn: Youghiogheny River, near Cucumber Run, Ohiopyle State Park, Fayette County, Pennsylvania 2
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bogyawn: Loess Prairie, Loess Hills, Hitchcock Nature Center, Missouri River Valley, Pottawattamie County, Iowa 4