The hairy pambu split from the giant pambu. To facilitate light absorption, this plant started to develop longer leaves that continuously grow during all of its life, extending almost to the ground. In contrast to its ancestor, it stops growing in virtue to its great light absorption. The size of its leaves is only limited by the presence of its consumers, such as the small pambu worm and the browsing capoo. These leaves facilitate the water absorption, which is restrained mainly in the extremity of the leaves, then being lead to the main body of the plant.