has part has part has_part archegonium megagametophyte archegonium megagametophyte A megagametophyte (PO:0025279) that has as parts one or more archegonia (PO:0025126). 2011-03-31T07:08:48Z 造卵器大配偶体 (Japanese, exact) archegonial megagametophyte (exact) Megagametophytes in bryophytes only produce egg cells, but do not develop from megaspores, because there is no heterospory in bryophytes. In some pteridophytes, megagametophytes develop from megaspores. arquegonio del megagametofito (Spanish, exact) plant_anatomy rwalls PO:0025282 anatomical entity