FLOWERS OF LAKES, RIVERS, ETC. 



YELLOW WATER LILY (Nymphcea lutea, L.), showing Reed Swamp and 

 Floating-leaf Association 



As an aquatic this plant has floating leaves, with slender, long, rope- 

 like rhizomes or stems, which are in reality little more than branches. 

 The flowers rise up above the level of the water, and open during the 

 sunshine and the daytime, and close at night and are submerged. The 

 parts, which are numerous and merge into each other e.g. petals, 

 sepals, stamens are spirally arranged. 



The shape of the carpellary organs, like a brandy bottle, has pro- 



