Abstract: It is important to identify plant species because plants has variety of medicinal and healthy food properties. Several methods have been introduced by researchers to identify objects . Shape is an important aspects in identifying plants. Moment invariants have been most probably used as features extraction for shape recognition. Moment invariants are computed based on the contours and interior portion of leaf. In this research three method were studied to identify plants using shape features was accomplished. Out of them two approaches i.e zernil moments and polar transforms were never been used in plat identification.