

*"tl' : I 





m 



Fig. 19.— Aquatic Vegetation, Reed-swamp Association, and Floatixg-leaf Association 



WITH Yellow Flag, Bulrush, Yellow Water-lily. 



C. 7?. Mapp. See page 83. 



Fk;. 20.— Aquatic Vegetation, Slow-flowing Stream, poor in Mineral Salts 



WITH Ranunculus penicillatus. 



C. B. Dixon. Seepage 84. 



