| Riassunto: | Francisco Hernández (1517/1518-1584), in his Historia de las Plantas de la Nueva España, included 3076 piants with native names, descriptions, medicinal uses and región where they grow. Fifty two of them have been identified as fems but unfortunately only five are illustrated, Previous studies of the books of Hernández were made by F. Altamirano, M. Altamirano, M. A. Batalla et al., F. Miranda and J. Vaidés, F. Miranda et al., and J. Vaidés and H. Flores, who attempted the botanical interpretaron of the piants with partial success, because of the vagueness of the descriptions. Based on the former interpretations, a new evaluation of the pteridophytes included in Hernández is presented. We believe that five piants of the fifty two pteridophytes mentioned are angiosperms (2 Ranunculaceae, 1 Piperaceae, 1 Leguminosas or Coriariaceae and 1 of unknown family); the ¡nterpretation of twelve piants is noí possible, although apparently they are pteridophytes. The remaining 35 plants can be interpreted as pteridophytes, at least at the genus level.
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