All tree leaves have an outer layer called the epidermis, which can also be used in the identification process. This leaf "skin" always has a waxy cover called the cuticle and varies in thickness.

Baobab trees may be a proxy for measuring long-term use of land by humans. They live long, have economic benefits, and are ...

One of these plants is the baobab tree, which looks like an up­side-down plant with its roots in the air. The baobab made the trip from Africa to the West In­dies dur­ing the height of the slave trade ...