Cattleya harrisoniana ("Harrison's Cattley's orchid") is a bifoliate Cattleya species of orchid. The diploid chromosome number of C. harrisoniana has been determined as 2n = 40. The haploid chromosome number of C. harrisoniana has been determined as n = 20.
A comparison between C. harrisoniana and C. loddigesiihttps://web.archive.org/web/20110714101505/http://mirandaorchids.com/loddigesiiVGA.htm