The Arid House contains an outstanding, worldwide collection of succulents – plants adapted to store water. This collection dates back to the 1920’s, when UCB botanists began to explore the world’s arid regions. Most of the specimen in this greenhouse were grown from seeds and cuttings collected from plants in the wild, in their natural habitats. The Arid House was constructed to hold succulents that cannot survive our cool, rainy, Bay Area winters. It consists of three chambers – a display chamber, a warm growing chamber in which the night temperature stays high all year round, and a cool growing chamber where the night temperature drops significantly during the winter.