Some are heart shaped, some oval, while the leaves of other species suggest fat arrows.

The pericarp is the part that is most often used, but the leaves of various species are used as well in some regions of China.

The leaves of several species also yield fiber: for instance, Agave rigida var.

The leaves of certain species, such as L. graveolens, can be used as a culinary herb similar to oregano.

Young larvae mine the leaves of Malus species.

They need to be careful not to eat too many leaves of certain species in one sitting, as some contain toxins that can poison them.

The leaves of several species furnish the senna used in medicine.

The leaves of temperate species provide autumn color.

The leaves of most species have lobed or serrate margins and are somewhat variable in shape.

The leaves of most species have serrated edges, but a few, such as B. integrifolia, do not.