NPS/MARGE POST

Petrified logs - the most common fossil plant found in the park.

Linnaean taxonomy of Late Triassic Plants of Petrified Forest National Park
Compiled by W.G. Parker and Sid Ash December 8, 2004

Kingdom Plantae
 Division Pteridophyta
Class Filicopsida
     Order Uncertain
       Family Guaireaceae
         Genus Itopsidema
           Species vancleaveii
       Family Cynepteridaceae
         Genus Cynepteris
           Species lasiophora
     Order Gleicheniales
       Family Gleicheniaceae (?)
         Genus Wingatea
           Species plumosa
     Order Matoniales
        Family Matoniaceae
      Genus Phlebopteris
            Species smithii
     Order Polypodiales
        Family Dipteridaceae
          Genus Clathropteris
            Species walkerii
     Order Osmundales
        Family Osmundaceae
          Genus Todites
            Species fragilis
     Order Hymenophyllales
         Family Hymenophyllacaea
           Genus Hopetedia
             Species n. sp.
   Class Uncertain
  Order Uncertain
     Family Uncertain
        Genus Cladophlebis 
          Species daughertyi
              Species yazzia
              Species sp.
           Genus Marcouia
              Species neuropteroides
 Division Coniferophyta
Class Pinopsida
  Order Coniferales
     Family Uncertain
        Genus Araucarioxylon
              Species arizonicum
         Family Araucariaceae
            Genus Araucarites
               Species n. sp.
            Genus Araucariorhiza
               Species joae
         Family Uncertain
            Genus Brachyphyllum
               Species hegewaldia
            Genus Pagiophyllum
               Species simpsonii
            Genus Podozamites
               Species arizonica
               Species n. sp.
   Order Cordaitales
      Family Cordaitaceae
            Genus Samaropsis
               Species puerca
            Genus Dadoxylon
               Species chaneyi
   Class Uncertain
       Order Uncertain
          Family Uncertain
             Genus Schilderia
                Species adamanica
             Genus Woodworthia
                Species arizonica
             Genus Pelourdea
                Species sp.
             Genus Carpolithus
                Species chinleana
 Division Pteridospermophyta
Class Uncertain
   Order Uncertain
      Family Uncertain
             Genus Sphenopteris
                 Species arizonicum
             Genus Dinophyton
                 Species spinosus
             Genus Pramelreuthia
                 Species yazzi
Division Sphenophyta
Class Equisetopsida
       Order Equisetales
          Family Equisetaceae
             Genus Equisetites
                 Species bradyi
                 Species sp.
             Genus Equicalastrobus
                 Species chinleana
             Genus Neocalamites
             Species virginiensis
                 Species sp.
 Division Lycophyta
Class Lycopsida
   Order Lycopodales
       Family Uncertain
           Genus Chinlea
              Species campii
               Species sp.
               Genus Lycopodites?
                   Species sp.
 Division Cycadophyta 
Class Bennettitopsida
      Order Bennettitales
          Family Uncertain
              Genus Zamites
                   Species powellii
Class Cycadodsida
       Order Cycadales
           Family Uncertain
               Genus Aricycas
                   Species paulae
               Genus Cycadospadix
                   Species n. sp.
               Genus Lyssoxylon
                   Species grigsbyi
               Genus Charmorgia
               Species dijolli
 Division Ginkgophyta
Class Ginkgoopsida
   Order Ginkgoales
          Family Uncertain
               Genus Baiera
                   Species arizonica
               Genus Ginkgoites
                   Species n. sp.