page 251 of L. P. Felix and M. Guerra: "Variation in chromosome number and the basic number of subfamily Epidendroideae (Orchidaceae)" Botanical Journal of the Linnean Society163(2010)234—278. The Linnean Society of London. Downloaded October 2010 from http://onlinelibrary.wiley.com/doi/10.1111/j.1095-8339.2010.01059.x/abstract
