The Anatomical Structures and Floral Development of Euryale ferox Salisb Ultrastructural Changes in the Development of Tapetal Cell of Euryale ferox A Study on the Embryo and Its Nutritive Tissues, Endosperm and Perisperm of Nymphaeaceae in China STUDY ON THE EARLY STATE OF ONTOGENY OF EURYALE FEROX SALISB A PRELIMINARY STUDY ON THE DEVELOPMENT OF TRANSFER CELLS OF THE COT/LEDONS DURING SEED GERMINATION OF EURYALE FEROX SALISB