Other Pondweeds T here are about 80 species of pondweeds in the world. They occur in a variety of aquatic habitats. Some pondweeds are totally submersed, others have floating leaves. Pondweeds may be relatively large plants, such as Potamogeton illinoensis , and some are small, such as Potamogeton diversifolius . Some have relatively large leaves, such as Potamogeton nodosus , and others have very narrow leaves, such as Potamogeton pusillus and Potamogeton pectinatus .
Pondweeds are very important as wildlife food.