Description from orchidspecies.com
Common Name Onion-leafed Brassavola, Flower Size 2" [5 cm]
A small sized, hot to warm growing, epiphytic species found in Bolivia, Paraguay and Brazil in subxerophytic forests on cliffsides at elevations of 1200 to 1800 meters with slender, erect or ascending, slightly arcuate and flexuose stems carrying a single, apical, erect, spreading or arcuate, subcylindric, sulcate above, long attenuate apically leaf that blooms in the summer through fall in cultivation and the winter in Brazil on a shorter than the leaf, erect to arcuate, bracteate raceme having spreading, coriaceous, narrowly triangular floral bracts with 2 to 3 flowers that are fragrant at night and arises from the crease at the base of the terete leaf. Best grown mounted wood, with high light and humidity, ample water while in growth and a lessening after the psuedobulbs have matured and flowered.
Synonyms Bletia ceboletta Rchb.f 1862; Brassavola chacoensis Kranzl. 1905; Brassavola reginae Pabst 1978; Brassavola ovaliformis Schweinf. 1949;