ALGAE is a plant that has no roots, stems or leaves. It will range in size and is a free floating multi-celled organism.
SUBMERGED PLANTS have stems and leaves that grow completely underwater. Some may have floating leaves. These types of plants grow best at the deepest part of the Littoral Zone.
FLOATING-LEAF PLANTS root themselves in the bottom of the lake but their stems and their flowers lay on the top surface. An example would be the well-known Waterlily.
EMERGED PLANTS have their roots in the bottom of the lake. Their stems and leaves extending out of the water. Cattails are an emerged plant.