Cattleya rex Cattleya rex Cattleya rex is a species of epiphytic orchid of showy white flowers, native to montane forests in Peru and Bolivia. Epiphytic herb with cylindric or spindle-shaped pseudobulbs, up to 35 cm. high, with one leaf at the top. Leaf oblong or elliptic-oblong, obtuse, light green, up to 35 cm. long and up to 6 cm. wide, coriaceous. Inflorescence up to 20.3 cm. high, with 3 to 6 (or 10) flowers. Flowers large and showy, up to 17 cm wide, with sepals and petals being cream-colored or ivory white, except the lip or labellum, which is colored with yellow,
Flower constancy could require substantial investment and switching to other flower types or species could be inefficient and consequently non-adaptive. Concentrating and feeding on one particular flower type increases the insect’s efficiency to obtain nectar from that flower type with respect to other flower types that are available. The costly information hypothesis explains flower constancy based on the fact that insects stay constant and feed on a one flower type because they know they are obtaining a reliable reward: nectar. The insect therefore does not venture to feed on other flower types because it cannot predict the amount of nectar in other