Palm wine, also known as "kallu," is a popular alcoholic spirit in Asia and Africa. It can be made from coconut palms, date palms, Chilean wine palms, and other plants. Though many palm species are strong and plentiful, as many as 100 are threatened by deforestation and unsustainable cultivation practises, such as the heart of palm, which comes from a part of the tree that cannot be regrown. The Hyophorbe amaricaulis palm tree is the most rare. The only one left now resides at the Curepipe Botanic Gardens in Mauritius .