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Reconstructions of Archaeopteris, and Further Consideration of its Phylogenetic Position
Charles B. Beck
American Journal of Botany
Vol. 49, No. 4 (Apr., 1962), pp. 373-382
Published by: Botanical Society of America, Inc.
Stable URL: http://www.jstor.org/stable/2439077
Page Count: 10
You can always find the topics here!Topics: Ferns, Genera, Plants, Leaves, Gymnosperms, Fructification, Evolution, Branches, Xylem, Secondary xylem
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Two reconstructions, one of a branch bearing the basal part of 3 leaves and the other of the habit, are presented with the evidence upon which they are based. An analysis is made of some features which characterize the ferns. These, and characters of Archaeopteris, are considered in the light of present knowledge of evolutionary trends, and the conclusion is reached that Archaeopteris was neither a primitive fern nor a fern ancestor. Additional evidence is discussed which supports the view that the plant was a progymnosperm.
American Journal of Botany © 1962 Botanical Society of America, Inc.