Paper · 1989 · 中国科学通报:英文版

OCCURRENCE OF EARLIEST CYCADS IN THE PERMIAN OF CHINA AND ITS BEARING ON THEIR EVOLUTION

高志峰; Barry; A. O. Thomas

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Abstract

Living cycads show a range of archaic features which suggest that they are primitive plants. They have a long fossil record, but this unfortunately consists largely of vegetative leaves. Very few reproductive organs are preserved as fossils. However,

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