1. A. M. Giulietti, J. R. Pirani, S. D. Dav; V. H. Heywood, O. Henera-Macbryde, J. Villa-Lobos, and A. C. Hamilton, 1997 . Espinhaco range region, Eastern Brazil . - In: ), Centres of plant diversity: a guide and strategy for their conservation. World Wide Fund for Nature (WWF) and Word Conservation Union (IUCN), Cambridge, v. 3, pp.397 -404 .