Cattleya walkeriana Cattleya walkeriana Cattleya walkeriana (Walker's cattleya) is a species of orchid. It differs from most species of "Cattleya" by having inflorescences which arise from the rhizome instead of from the apex of the pseudobulb. In its native habitat (Brazilian Central Plateau) it grows as either an epiphyte or a lithophyte, sometimes in full sun. Pseudobulbs are relatively short, bulbous or fusiform, with one or two ovate leaves at the apex. Inflorescence is one- or few-flowered, about 8" (20 cm) tall. Flowers are 4-5" (9-12 cm) across. Genetically "C. walkeriana" is close to bifoliate Cattleyas. The diploid chromosome number of "C.
Portia labiata in all cases. A test in 1997 showed that "P. labiata" from the Philippines and from Sri Lanka have similar preferences for different types of prey, and that the order of preference is: web spiders; jumping spiders; and insects. These preferences apply to both live prey and motionless lures, and to "P. labiata" specimens without prey for 7 days ("well-fed") and without prey for 14 days ("starved"). "P. labiata" specimens without prey for 21 days ("extra-starved") showed no preference for different types of prey. The test included as prey several species of web spiders and jumping spiders, and the selection