Can you tell your Sagittaria sagittifolia from your Apium nodiflorum? Who knows or cares? Well, botanists have to care, but the rest of us rarely need to. Most people like to just walk along a river bank. Do you ever notice the plants living there, and in the water? Can you determine the health of a stream or river just by looking at it? This little book will help, as it takes the inquisitive walker along an illustrated journey of watery habitats and their vegetation. River plants have the advantage of being stationary. They do not swim or run away from observers. They are excellent bioindicators-showing life, health and structural conditions of a river. Learn to look and see, and identify the plant communities which live in a river near you. Hopefully you will be inspired to investigate further....