The Devonian Explosion

Baragwanathia longifolia. 15 cm specimen. Wilson Creek Shale, Upper Silurian-Lower Devonian. Woods Point, Victoria, Australia.	Jenisseiphyton rudnevae, Emsian, Lower Devonian, Torgashinskoe, near Krasnoyarsk.	Pectinophyton bipectinatum, Emsian, Lower Devonian, Torgashinskoe, near Krasnoyarsk.	Pectinophyton extracted (digitally) from its matrix.	Protobarinophyton obrutschevii strobili to 45 mm long. Lower Devonian, near Krasnoyarsk, Siberia.
Protobarinophyton obrutschevii Ananiev 1955, with three spore cones. Emsian, Lower Devonian, Torgashinskoe, near Krasnoyarsk.	Psilophyton princeps, 21 cm, Emsian, Lower Devonian, Eastern Siberia.	Psilophyton in essence	Asteroxlyon mackiei, a clubmoss, in 3 cm piece of Lower Devonian Rhynie chert. Notice the stellate xylem strands.	Asteroxylon rhizome
Rhynia gwynne-vaughnii 2mm stem in transverse section.	Aglaophyton major 11 m longitudinal section of branching stem.	Aglaophyton major, 4mm sporangium with spores. Note thick sporangial wall.	Aglaophyton major, 4mm sporangium with spores. Note thick sporangial wall.	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.	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	Rhacophyton