Gametophyte morphology and anatomy of Didymochlaena truncatula (Dryopteridaceae)

Sexual phase development was studied in Didymochlaena truncatula, on the ba sis of spores collected in Peninsula Moreno and Tebanca, Catemaco, Veracruz , Mexico. The spores are monolete, ellipsoid, with perine, and non-clorophy llic. The germination pattern is of the Vittaria-type and the prothallial d evelopment is of the Adiantum-type, the adult gametophytes are cordiform to reniform and without trichomes; the gametangia are typical of the leptospo rangiate ferns. The first leaf of the sporophyte appears 100 days after the sowing of the spores, the lamina is spatulate, with dichotomous venation a nd short capitate, unicellular marginal hairs.