{ {1. Large cell (part of = Vegetative cell. { antheridium wall?), with { its nucleus surrounded { by wall of spore Male gametophyte {2. Small cell with nucleus, = Generative cell. { no wall, floating in { protoplasm of large cell { is the central cell of { antheridium { (male sexual organ) {Mature male prothallium = Pollen grain { with tube. {Antheridium cell divided, = Paternal cells, { 2 sperm cells or generative { cells. -------------------------------------------------------------------- { {Stigma. {Macrosporophyll = {Carpel or {Style. Sporophyte { {simple pistil {Ovary. { { {Macrosporangium, covered = {Nucellus, covered { by 1 or 2 coats { by 1 or 2 { { coats = ovule. -------------------------------------------------------------------- {Macrospore, cell in end of = Uninuclear state { macrosporangium, does of embryo sac. { not become free, cavity { enlarges {Macrospore divides into { 8 cells to form young { female prothallium = Embryo sac. { Female gametophyte. {Remnant of archegonium, = Maternal cell, { egg (female sexual organ) or germ cell. {Growing part of prothallium = {Two polar nuclei { { fused, making { { endosperm { { nucleus. {Mature female prothallium = {Endosperm, { { developed by { { many divisions { { of endosperm { { nucleus. -------------------------------------------------------------------- Young sporophyte {After fecundation of egg, egg divides surrounded by { to form embryo. Embryo in endosperm parts of the { (sometimes latter nearly or quite