Cattleya percivaliana is a species of orchid. It shares the common name of "Christmas orchid" with C. trianae and Angraecum sesquipedale. The diploid chromosome number of C. percivaliana has been determined to be 2n = 40. The haploid chromosome number has been determined to be n = 20.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 Society 163(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
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