Loulu (Pritchardia kaalae)
Fewer than 130 individual Loulu trees remain in the Waianae Mountains on the Hawaiian island of Oʻahu. The critically endangered palm tree's main threat is rodents and other animals that eat its seeds, preventing regeneration, according to the IUCN.
Also known as a wahane, these trees can grow up to 30 feet tall and bloom with yellow flowers in December. According to the University of Hawaii, Loulu means "umbrella," and the tree got its name because the leaves were formerly used as protection from rain or sun.