When the results of endophyte surveys are analyzed in species accumulation curves it is often found that these curves are non-asymptotic (Fig. 1), suggesting that if more plant samples would have been analyzed, more endophytic species would have been discovered. These results imply that most surveys of endophytic mycobiota underestimate the real number of species associated to a given plant species. In fact, when mathematical estimators of the total species abundance are applied to field data (Chazdon et al., 1998), the number of endophytic species potentially associated to a plant species is often estimated in several hundreds (Sánchez Márquez et al., 2007).