Castanospermum is a botanical term that refers to a genus of trees native to Australia, commonly known as the black bean tree. Some synonyms for Castanospermum include Moreton Bay chestnut or black bean. These trees are known for their large, glossy leaves and fragrant blooms, which attract a host of pollinators such as bees and butterflies. The trees produce pods containing seeds that are toxic to humans but provide food for a range of wildlife. Castanospermum trees are often used for their ornamental value in landscaping and as a shade source for outdoor living spaces.