Cordaitales


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Noun1.Cordaitales - extinct plants having tall arborescent trunks comparable to or more advanced than cycads; known from the Pennsylvanian period; probably extinct since the Mesozoic era
plant order - the order of plants
class Coniferopsida, Coniferophyta, Coniferophytina, Coniferopsida, subdivision Coniferophytina - cone-bearing gymnosperms dating from the Carboniferous period; most are substantial trees; includes the classes Pinopsida (subdivision Pinophytina) and Ginkgopsida (subdivision Ginkgophytina) and Taxopsida (subdivision Taxophytina) which in turn include the surviving orders Coniferales and Taxales (yews) and sometimes Ginkgoales as well as extinct orders such as Cordaitales (of the Carboniferous and Permian)
Cordaitaceae, family Cordaitaceae - chiefly Paleozoic plants; Cordaites is the chief and typical genus
References in periodicals archive ?
The controversy was resolved by the Swedish paleobotanist Rudolf Florin (1938-45) who demonstrated a reduction series, starting with ancestral Cordaitales and early, now extinct, coniferous groups, in which the ovulate strobilus was indeed a branched structure.
The male reproductive organs of the Cordaitales consisted of elongated clusters of strobili, each strobilus composed of spirally disposed sterile scales and fertile scales, or microsporophylls.
Current views of the relationships were recently summarized by Clement-Westerhof (1988): The Florin view holds that ancient conifers of the Late Pennsylvanian and Early Permian assigned to the Lebachiaceae (Lebachia, Ernesiodendron, and Walchia) evolved from the Cordaitales and were transitional between them and Late Permian and Triassic conifers.