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 is about equally effective with all sizes of web spiders up to twice "P. labiata"′s size. A female "P. labiata" is effective against insects up to twice "P. labiata"′s size when the insect is stuck in a non-salticid's web, and against insects not in webs and up to "P. labiata"′s size, while "P. labiata" seldom pursues or catches a larger insect in the open. A female "P. labiata" very seldom pursues or catches a larger insect in her own web, and is slightly less effective against smaller insects in "P. labiata"′s web than in other situations. Males are less efficient