XVI International Botanical Congess

In Querétaro State are 50 genera and 191 species of pteridophytes, 4 genera and 17 species are heterosporeus and the rest are isosporeus. All the heterosporeus pteridophytes were possible the separation palinological, but in the isosporeus pteridophytes some genera present spores similares (Polypodium, Campyloneurum, Pecluma). The palinological genera separation was possible in the 50% the isosporeus pteridophytes and the characters for separation were aperture, ornamentation, thickness of the exine, presence or absence the perispore and crest and fold in the perispore and size spore.