In a message dated 97-09-25 16:41:55 EDT, you write: << Or any other book that deals with plants native to North America? >> For identification and biblio. how about G.W. Prescott's The Aquatic Plants... mainly North America, dichotomous key... mine from 1969, LCN 79-89534 from Pictured Key Nature Series. Bob Fenner, bobfenner at aol_com