Final answer:
A marchantia female gametophyte has a flattened body called a thallus and produces umbrella-shaped structures called archegoniophores containing egg-producing archegonia.
Step-by-step explanation:
A marchantia female gametophyte has a flattened body called a thallus, which spreads across the ground surface. It is characterized by repeated branching into two parts. The thallus has multiple layers of cells, with the top layer having permanently open pores for carbon dioxide entry. The female gametophyte produces umbrella-shaped structures called archegoniophores, which contain egg-producing archegonia. The female gametophyte is hard to find as it is small and imbedded on the underside of archegoniophores.