Eight strains of Rhizoctonia-like mycorrhizal fungal were isolated from the root system of neotropical orchids, Bulbophyllum weddelii (Lindl.) Rchb. f., Epidendrum dendrobioides Thunb., Maxillaria acicularis Herb. ex Lindl., Oncidium gracile Lindl., Pleurothallis teres Lindl., Prosthechea vespa (Vell.) W.E. Higgins, Sophronitis milleri (Blumensch. ex Pabst) C. Berg & M.W. Chase and Sarcoglottis sp., growing in "campos rupestres" in "Quadrilátero Ferrífero" region, Minas Gerais State, Brazil. Three anamorphic genera were identified: Epulorhiza, isolated from the root system of E. dendrobioides and S. milleri; Ceratorhiza, isolated from B. weddelii, O. gracile, P. teres and P. vespa; Rhizoctonia, isolated from M. acicularis and Sarcoglottis sp. This is the first report of Rhizoctonia-like fungi isolated from the root systems of orchids from the "campos rupestres" in Brazil.
diversity; Rhizoctonia-like fungi; Orchidaceae; symbiosis
