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Petrified Forest National Park Painted Desert filled with clouds during a temperature inversion, Photo by Marge Post/NPS
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Petrified Forest National Park
Plant Megafossils
 
petrified wood

NPS/MARGE POST

Petrified wood may not have bark, limbs, roots, or leaves, but it often has distinctive characteristics that help scientists identify it.

Late Triassic plant megafossils found in Petrified Forest National Park
Compiled by Dr. Sid Ash, September 2003

* species based on fossils collected in the park
** species and genotype based on fossils collected in the park

Lycopods
Chinlea campii**
Chinlea
sp.

Horsetails
Equisetites bradyi*
Equisetites
spp.
Equicalastrobus chinleana**
Neocalamites virginiensis
Neocalamites
sp.

Ferns and Fernlike Foliage
Cladophlebis daughertyi*
C. yazzia*
Cladophlebis
spp.
Clathropteris walkeri*
Cynepteris lasiophora*
Itopsidema vancleaveii**
Phlebopteris smithii*
Sphenopteris arizonica*
Todites fragilis*
Wingatea plumosa**


Cycads
Aricycas paulae**
Charmorgia dijolli**
Lyssoxylon grigsbyi**


Cycadeoids
Zamites powellii

Ginkgoes
Baiera arizonica*

Cordaites
Dadoxylon chaneyi*

Conifers
Araucariorhiza joae**
Araucarioxylon arizonicum
Brachyphyllum hegewaldia*
Pagiophyllum simpsonii*
Podozamites arizonicus*
Samaropsis puerca*

Position Uncertain
Carpolithus chinleana*
Dinophyton spinosus**
Marcouia neuropteroides**
Pramelreuthia yazzi*
Schilderia adamanica**
Woodworthia arizonica**

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Last Updated: September 25, 2010 at 15:15 MST