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