The saguaro is a large cactus native to the Sonoran Desert in the southwestern United States and Mexico. It can grow to be quite tall, reaching heights of up to 40 feet and living for over 150 years. The saguaro is easily recognized by its tall, upright arms that extend upward, resembling a giant green tree. These cacti bloom beautiful white flowers in late spring, which open at night and close by the next afternoon. The flowers are a vital food source for various pollinators, including bats and birds. The saguaro also produces red fruit that is edible and can be harvested for food or made into syrup.