Manchester Memoirs^ Vol. liii. (1909), No. II. 7 



Braun, 1870, and subsequently by Ascheron and 

 Graebner,* and are described and figured by Gluck.f 



They do not seem to have been noted by English 

 botanists, but were clearly visible in specimens gathered 

 in February, and on which the old leaves of the stem 

 were dying away (/^/X''- '• ''^)- 



Fig. I. A. Old shoot of Canadian Pond weed Elodea canadensis. The end 

 of the shoot is often bent up and is composed of closely set leaves. 

 An autumnal lateral shoot {a.b.) has also been formed besides the 

 winter buds {w.h.). 

 B. Winter bud enlarged showing decussate arrangement oi bud scales. 



* Ascheron P. and P. Graebner, " Synopsis der Mitteleuropaeischen 

 Flora," vol. i,. part 6, p. 403. 



t Gliick, H. ' Biologische und Morphologische Untersuchungen Uber 

 Wasser und Sumpfgewachse." 1906, p. 86. 



