The palm plant of the palm family is the national tree of Cuba, with a height of 20-30 meters. The trunk looks very sturdy on the outside, but in fact, it is strong on the outside but weak on the inside. When we tap it with our hands, we can hear that the inside is hollow because the trunk is composed of coarse fibers with low density, and it is not usually used for furniture. However, the fallen leaves can be used to make thatched houses.