Week 17: Structure of Ovule Megasporogenesis, Megagametophyte, Endosperm formation, Parthenocarpy, Polyembryony

Chapter 9: Flowers and Reproduction, page 228,

In book

Botany: an introduction to plant biology by James D. Mauseth.  2/e, Multimedia enhanced edition . Jones  and  Bartlett  Publishers. 1998.