bitegmic

adjective

Of an ovule possessing two integuments. Plants with monocotyledonous features tend to be unitegmic, whereas those groups with dicotyledonous features tend to have two integuments (or, to be bitegmic). Integuments are protective layers of cells surrounding the ovule. At the point where sperm enter the egg, the protective layers may be seen as one or two distinct layer (the layers are obscure elsewhere). They are best seen in a longitudinal section of the ovule.