"extinct plants having tall arborescent trunks comparable to or more advanced than cycads; known from the Pennsylvanian period; probably extinct since the Mesozoic era"@en-us . "order Cordaitales"@en-us . . . "11606379-n"^^ . . "0"^^ . "110861696"@en-us . . . "0"^^ . . . . . "Cordaitales"@en-us . "Cordaitales"^^ . . "107924005"@en-us . . "111606379"^^ .