Tullasnella spp. have been found forming mycorhizal associations with plants of all Orchidaceae subfamilies, and they are one of the main symbionts in partially micoheterotrophic plants (Taylor et al. 2002). Little is known about mycorhizal fungi of Neotropical Orchidaceae, especially in Laeliinae that occur in distinct environments such as “Restingas”, Seasonal Forests and “Campos Rupestres” (Cruz et al. 2003, Britto et al. 1993, França et al. 1997, Withner 2000). Tullasnella spp. have been found forming mycorhizal associations with plants of all Orchidaceae subfamilies, and they are one of the main symbionts in partially micoheterotrophic plants (Taylor et al. 2002). Little is known about mycorhizal fungi of Neotropical Orchidaceae, especially in Laeliinae that occur in distinct environments such as “Restingas”, Seasonal Forests and “Campos Rupestres” (Cruz et al. 2003, Britto et al. 1993, França et al. 1997, Withner 2000).