6o 



POTAMOGETONACEAE 



[CH. 



erect shoots, if detached from the parent, can form new plants. 

 The leafy shoots branch relatively sparsely in the large-leaved 

 forms, but more freely in those with small leaves. 



FIG. 37. General branch system of a typical Potamogeton. I, II, III, . . .the different 



shoot-generations; a, b, c: a', b', c',. . .the three first scale-leaves borne by each 



shoot-generation; II', III' is a reserve shoot arising in the axil of leaf c belonging 



to shoot I. [Adapted from Sauvageau, C. (1894).] 



