Ginkgo biloba: The Ovuliferous Leaf and Its Phylogenetic Implication

Ma Feng-Shan, Li Jian-Xiu

Received:1900-01-01 Revised:1900-01-01 Online:1991-03-10 Published:1991-03-10
Contact: Ma Feng-Shan

Abstract:

This paper reports the occurrence of the ovuliferous leaves on a Maidenhair tree

(Ginkgo biloba)growing in Longdong, Yiyuan County, Shandong Province. This phenome-

non is discussed in connection with the history of Ginkgoales. It is believed that this discovery

serves as an illustration of the hypothesis that the secondary apical position of ovules

(Ginkgoales) is a modification of the marginal position (Pteridospermidae). Again, it proba-

bly leads to the assumption that, in Ginkgo, “the foliage leaves” bear some features of “the

sporophylls” and they are derived from telomes.

Key words: Ginkgo biloba, ovuliferous leaf

Ma Feng-Shan, Li Jian-Xiu. Ginkgo biloba: The Ovuliferous Leaf and Its Phylogenetic Implication[J]. .

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