BSA Online Image Collection, Paleobotany

Welcome to the Botanical Society of America's online image collection. We hope you enjoy a browse through our members' contributions. Please note: each image acts as a link to a page containing more information, and a larger version of the picture. RETURN TO THE IMAGE MAP

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Aglaophyton major (sporangium) Asterophyllites (Calamites leaves) Asteroxylon mackei (stem, x.s.) Baragwanthia Calamites sp.
         
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Calamites sp. Calamites sp. Calamites (shoot apex) Calamostachys binneyana (cone, l.s.) Calamostachys binneyana (cone, x.s.)
         
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Delnortea abbottiae - Permineralized leaf fragment This is a kodachrome of a permineralized leaf fragment of Delnortea (USNM 387477) Delnortea abbottiae - Permineralized leaf fragment This is a kodachrome of a permineralized leaf fragment of the largest known fossil leaf of Delnortea (USNM 387473) Delnortea abbottiae - Permineralized leaf fragment This is a kodachrome of a permineralized leaf fragment of Delnortea. The woody midrib, clearly visible on the slide, was used by William E. Stein, Jr., Ph.D. to create the polished thin-sections yielding the first images of a bifacial cambium and conducting xylem and phloem tissue of any Permian gigantopterid; shown as Figs. 23-36 (USNM 372427) Heterangium americanum (phloem parenchyma, l.s.) Heterangium americanum (phloem parenchyma, 1.s.)
         
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Heterangium americanum (secondary xylem & phloem, x.s.) Heterangium americanum (sieve areas) Heterangium americanum (stem, x.s.) Horneophyton lignieri (sporangium, l.s.) Lepidodrendron f. selaginoides (leaf base w/ligule)
         
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Lepidodrendropsis (leaf cushion) Lepidodrendron sp. Lepidodrendron sp. (early periderm)+B38 Lepidodrendron sp. (small stem, x.s.) Lepidodrendron sp. (stele, cortex, x.s.)
         
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Minerisporites mirabilis (f. Selaginella) Molaspora lobata (megaspore, polar view) Molospora lobata (megaspore, lateral view) Rhynia gwynne-vaughani (stem, x.s.) Spermatites sp. (seed-like megaspore, 100 X)
         
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Sphenophyllum plurifoliatum Sphenophyllum sp. Stigmaria (axis, x.s.) Thomasonia sp. (Lycopod megaspore)  
         

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