Well...This might helps Parallel venation is characteristic of monocots, the veins are usually parallel to each other along the length of the leaf.
Pinnate venation is the veins are in a branching pattern, characterized by one major vein(called midrib) with smaller veins extending outward from it.
Palmate venation is characterized by two or more major veins extending outward from one point like the fingers extending form the palm of a hand