J Syst Evol ›› 1991, Vol. 29 ›› Issue (2): 187-189.

• Research Articles • Previous Articles     Next Articles

Ginkgo biloba: The Ovuliferous Leaf and Its Phylogenetic Implication

Ma Feng‐Shan, Li Jian‐Xiu   

  • Published:1991-03-10

Abstract: This paper reports the occurrence of the ovuliferous leaves on a Maidenhair tree (Ginkgo biloba)growing in Longdong, Yiyuan County, Shandong Province. This phenomenon 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 probably leads to the assumption that, in Ginkgo, “the foliage leaves” bear some features of “thesporophylls” and they are derived from telomes.

Key words: Ginkgo biloba, ovuliferous leaf