Reniform, kidney-shaped. This form is sometimes seen in wild plants, particularly in root-leaves. Leaves of wild ginger are nearly reniform.
Orbicular, circular in general outline. Very few leaves are perfectly circular, but there are many that are nearer circular than of any other shape. (Fig. [107]).
Fig. 107.—Orbicular Lobed Leaves.
Fig. 108.—Truncate Leaf of Tulip Tree.
The shape of many leaves is described in combinations of these terms: as ovate-lanceolate, lanceolate-oblong.