Cattleya warscewiczii (The "Warscewicz's Cattley's orchid"), a labiate Cattleya, is a species of orchid. It was first collected by Józef Warszewicz in Colombia in 1848-49 and formally described by Heinrich Gustav Reichenbach in 1855.The Showy Cattleya, Queen of the Orchids (Beginners` Handbook - XV) American Orchid Society Bulletin Vol.25, No.2 p.159 (1956) C. warscewiczii exhibits a typical Cattleya sympodial habit. Pseudobulbs are 8-16" (20-40 cm) long, unifoliate, cylindrical or cigar-shaped, grooved. Flowers are 7-11" (17.5-27.5 cm) across, largest in the genus, showy, fragrant.I. F. La Croix. The New Encyclopedia of Orchids: 1500 Species in Cultivation (Timber Press, 2008), p.92 In culture the flowering is in summer on that year's spring growth. Strong light and good air movement are required.

The diploid chromosome number of C. warscewiczii has been determined as 2n = 40; the haploid chromosome number as 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

C. warscewiczii hybridizes naturally with C. aurea / dowiana, producing C. x hardyana. C. warscewiczii has also been used extensively in Cattleya hybridization, to produce large-flowered hybrid Cattleyas.

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