On the Morphological Significance of Seed-bearing Leaves of Ginkgo (With Plate X)

Contributions to Cytology and Genetics from the Departinents of Plant-Morphology and of Genetics, Botanical Institute, Faculty of Science, Tokyo Imperial University, No. 69

Abstract

By studying the seed- or anther-bearing leaves of Ginkgo biloba, and comparing them with the normal flowers, the writer came to the following conclusions:
1. Seed- and anther-bearing leaves are senile forms.
2. The so-called collar of seed and knob-like terminal scales of anther are the residual portion of the lamina of the reproductive leaf.
3. Seed-bearing leaves are homologous to normal seeds.
4. Normal seed stalk is a floral axis.
5. Ovule and anther are phyllcme organs.