and pustule-like lesions. The plant is not frost-hardy and typically dies in places where temperatures are below freezing. Physiology Plants of the genus Kalanchoe as well as many other plants growing in arid regions photosynthesize via Crassulacean acid metabolism. Distribution Kalanchoe daigremontiana is native to the Fiherenana River valley and Androhibolava mountains in southwest Madagascar. It has been introduced to numerous tropical and subtropical regions, such as Florida, Puerto Rico, Hawaii, Venezuela, Argentina, Brazil, Uruguay, and parts of southern Europe. Habitat Kalanchoe daigremontiana prefers to grow in rocky and dry places. It can become an invasive plant and threaten natural ecosystems, especially in arid and semi-arid environments (South Africa and regions of South America for example), where it can inhibit native-plant recruitment. Gallery References Further reading External links Photos of Kalanchoe daigremontiana inflorescences United States Department of Agriculture profile on Kalanchoe daigremontiana plantoftheweek.com entry on Kalanchoe daigremontiana Poisonous houseplants entry on Kalanchoe daigremontiana daigremontiana daigremontianum House plants Plants described in 1914 Taxa named by Joseph Marie Henry Alfred Perrier de la Bâthie