This model is one of a series depicting various stages of the complex lifecycle of this tiny liverwort species. Marchantia polymorpha is dioecious, with plants being either male or female and may reproduce sexually or asexually. The starshaped model is of an archegonium which contain female gametophytes and produces ova which will be fertilised by sperm from a male plant. The fertilised ovum will develop into a small sporophyte, this then produces spores in a spore capsule (pictured in the second photo) on its underside. Spores are released and develop into free living gametophyte plants.