Potamogeton. 55 



17. P. Nuttallii Cham, et Schlechtd. in Linnaea II. (1827) 226 t. VI., fig. 25; 

 Morong in Mem. Torr. Bot. Club III. (1893) 2. 18. t. XXIX. — P. fluüam Pursh 

 Fl. Am. sept. I. (181 4) 120. — P. pennsylvanicus Cham, et Schlechtd. 1. c. (1827) 

 227; A. Benn. in Journ. of Bot. XXV. (1887) 289; Graebner in Urban, Symb. Antill. 

 IV. (1903) 72. — P. pumilus Wolfg. in Roem. et Schult. Mantissa III. (1827) 354 

 teste A. Bennett in Journ. of Bot. XXIX. (1891) 307. — P. Claytoni Tuckerman 



Fig. 15. Potamogeton Nuttallii Cham, ot Schlechtd. A Planta fructifera. B Fructus. (Iconcs 



originariae.) 



