Since an enormous number of botanically unrelated plants live on or near water, there's room here for only a physical description and one or two unusual facts (Indians ate arrowhead roots, the name Nasturtium means nose-twisting in Latin, etc.) about some of the most common and/or interesting varieties, including the carnivorous sundew, the ubiquitous cattail and the gigantic Victoria regia from South America. The unassuming sketches show enough detail for simple identification, and though the language of the text might have been further simplified, it passes on the kind of elementary plant lore which will stimulate the beginning botanist's powers of observation.