Crassula arborescens ssp. undulatifolia 'Blue Bird' has bounced around the botanical community under a number of different species. The Blue Bird jade plant elliptical/tongue shaped leaves have a distinctive bluish cast that forms a nice background for the pink-and-white flowers that cover the plant in mid-winter.

A member of the Crassulaceae plant family from South Africa, the plant has leaves that are succulent and feature an adaptation to arid environments known as Crassulean Acid Metabolism (CAM). Most plants open their pores (stomata) during the day to take in carbon dioxide, and in the process they lose water vapor to the atmosphere. Succulent plants with CAM open their stomata during the night to take in carbon dioxide and store it for use during the daylight hours.