Devonian Plants

Baragwanathia longifolia. 15 cm specimen. Wilson Creek Shale, Upper Silurian-Lower Devonian. Woods Point, Victoria, Australia.	Psilophyton princeps, 21 cm, Emsian, Lower Devonian, Eastern Siberia.	Protobarinophyton obrutschevii Ananiev 1955, with three spore cones. Emsian, Lower Devonian, Torgashinskoe, near Krasnoyarsk.	Rhynia gwynne-vaughnii 2mm stem in transverse section.
Aglaophyton major 11 m longitudinal section of branching stem.	Aglaophyton major detail showing elongate epidermis cells.	Aglaophyton major, 5mm diameter stems.	Aglaophyton major, 4mm sporangium with spores. Note thick sporangial wall.
Aglaophyton major, detail of spores in sporangium.	Aglaophyton major, detail of spores in sporangium.	Aglaophyton major, detail of spores in sporangium.	Aglaophyton major, 4mm sporangium with spores. Note thick sporangial wall.
Aglaophyton major, 4mm transverse section of stem showing star-shaped outline attributed to shrinkage on decay and desiccation.	Fungally infected Aglaophyton major, 3mm transverse section of stem.	23 cm section of the wood (Callixylon whiteanum) of Archaeopteris, one of the earliest trees. Woodford Shale, Oklahoma, USA.	Callixylon whiteanum, cross section of wood, field of view about 3 mm, Woodford Shale, Upper Devonian, Murray Co., Oklahoma.
Foliage of Archaeopteris sp. Duncannon Member, Catskill Formation, Upper Devonian. Red Hill, Hymer, Clinton County, Pennsylvania	Moresnetia zalesskyi. Late Devonian. Dinant, Belgium. The earliest seed plant. 15 cm slab with seed-bearing cupules to 10 mm.	Moresnetia zalesskyi. Late Devonian. Dinant, Belgium. The earliest seed plant. 15 cm slab with seed-bearing cupules to 10 mm.	Moresnetia zalesskyi. Late Devonian. Dinant, Belgium. The earliest seed plant. 15 cm slab with seed-bearing cupules to 10 mm.