2018年5月29日 · carpogonium (pl. carpogonia) The female gametangium of the red algae (see Rhodophyta). Carpogonia, which are found at the tips of the female gametophyte, are flask-shaped structures from which protrudes a slender elongation called a trichogyne. The nonmotile male spermatia, released from the antheridia, attach to the trichogyne during sexual ...