| The Asteraceae family presents a sporophytic self-incompatibility system, although a partial breakdown of the incompatibility system has been found in several species. |
| Like all land plants, they have a life cycle referred to as alternation of generations, characterized by alternating diploid sporophytic and haploid gametophytic phases. |
| Seed development requires co-ordinated expression of embryo and endosperm and is controlled by sporophytic, male gametophytic, and female gametophytic genes. |
| Self-incompatibility mechanisms have traditionally been found to operate in styles with either a sporophytic or gametophytic incompatibility system. |
| Following germination, sporophytic embryo tissue was separated from surrounding female gametophytic tissue. |
| In both species the gametophytic cells of the placenta generally have less prominent wall labyrinths than sporophytic cells. |
