Plant (2) - The shape of leaves

Does leaves have a pointed shape? Of course - not all leaves are pointed, but when I draw leaves as a long narrow shapes with a pointed end, the drawings seems to become more realistic.

Plant (1)

I have begun to draw plants - imaginary plants. In a way it is a completely machine independent type of simulation. What I want is to catch the complexity of plant structures on a sheet of paper. The success criteria is that I’ am able to accept the drawing as possible plant that I could find somewhere in nature.