Each unit is called a Leaflet . It is usually elevated above or below the lamina. This is the most common term used to describe venation in Monocots . Striate Venation - another term used to describe the complex venation patterns found in Monocots .
Parallel venation is called longitudinal-striate venation.
Dichotomous Venation - many veins of equal size which form two equal branches at successive branch points.