Usage examples (13)

• The archegonium is the female reproductive organ, which produces eggs.
• As in the liverworts the young embryo is completely covered by the growing archegonium wall.
• The young sporogonium is protected by a thick calyptra derived from the tissue of the thallus around the archegonium.
• Finally the pollen tube penetrates down to and through the open neck of the archegonium, until it comes in contact with the egg cell.