Cattleya walkeriana walkeriana" has been twice determined as 2"n" = 40; the diploid chromosome number of the variety "C. walkeriana" var. "princeps" has been determined as 2"n" = 80. 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-
Flower constancy more dissimilar, for example in their coloration. When, in a community of flowering plants, the flowers are all similarly colored, the constancy is often lower because different species are more difficult to distinguish, whereas constancy tends to be higher when the flowers are distinctly differently colored. Flower constancy benefits flower pollination but, arguably, constancy is not so obviously adaptive for pollinators. Individuals that show constant behavior ignore other flowers that could potentially provide more nectar (reward) than their preferred type. As a result, flower constancy seems to contradict optimal foraging models, which assume that animals will move minimal distances between