From their branches hang aerial roots, which reach to the ground and eventually create new tree trunks. 它们的树枝垂下挂的气生根须一直延伸到地面，最后又逐渐地生出新的树干。
It may be composed of thin-walled colorless cells and functions as water-storing tissue as in certain succulent leaves and the aerial roots of epiphytes. 其功能是保持水分，例如在某些肉质植物的叶中和一些附生植物的气生根中。
