Studies on Histochemistry of the Developmental Epiphyllous Ovule in Ginkgo biloba var. epiphylla Studies on Histochemistry of the Developmental Epiphyllous Ovule in Ginkgo biloba var. epiphylla Observa tion on Ultra structure of Sclerotesta and Endotesta from NormalSeeds and Epiphyllous Seeds of Ginkgo biloba var. epiphylla Mak The Changes in DNA Methylation Levels and Patterns of Ginkgo biloba var. epiphylla The Changes in DNA Methylation Levels and Patterns of Ginkgo biloba var. epiphylla Analysis on Karyotype and Its Evolutional Trend of Ginkgo biloba var. epiphylla Germplasms Resources Anatomical Structure and Stomatal Characteristics on the leaf of Ginkgo biloba var.epiphylla Analysis on Karyotype and Its Evolutional Trend of Ginkgo biloba var. epiphylla Germplasms Resources Observa tion on Ultra structure of Sclerotesta and Endotesta from NormalSeeds and Epiphyllous Seeds of Ginkgo biloba var. epiphylla Mak Comparison on Starch Characters in Endosperm of Ginkgo biloba var. epiphylla Mak. and Its Systematic Significance Comparison on Starch Characters in Endosperm of Ginkgo biloba var. epiphylla Mak. and Its Systematic Significance Comparative Studies on Morphology of Seeds of Ginkgo biloba var. epiphylla