BSA Online Image Collection, Paleobotany

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Aglaophyton major (sporangium)	Asterophyllites (Calamites leaves)	Asteroxylon mackei (stem, x.s.)	Baragwanthia	Calamites sp.
Calamites sp.	Calamites sp.	Calamites (shoot apex)	Calamostachys binneyana (cone, l.s.)	Calamostachys binneyana (cone, x.s.)
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.)
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)
Lepidodrendropsis (leaf cushion)	Lepidodrendron sp.	Lepidodrendron sp. (early periderm)+B38	Lepidodrendron sp. (small stem, x.s.)	Lepidodrendron sp. (stele, cortex, x.s.)
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)
Sphenophyllum plurifoliatum	Sphenophyllum sp.	Stigmaria (axis, x.s.)	Thomasonia sp. (Lycopod megaspore)

BSA Online Images

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