Often veins follow the shape of the leaf. They can curve along the leaf following
the margin, or they can break the margin and cause the leaf edges to end in fine
points, bristles, or spines. The veins can provide interesting textures to the
leaf surfaces. This helps in describing the plant and in enjoying its beauty.
As with many of the leaf characteristics, leaf veins can display
muliple characteristics such as having both impressed and reticulate