WATER PLANTS 169 



TRIFOLIATA (the Bog Bean) has become quite 

 established in several waters in the metropolis, 

 and its white horsechestnut-like flowers make 

 it a general favourite. It is of stout growth 

 and does well where the water is shallow. 

 Perhaps one of the showiest of aquatic plants 

 is the DOUBLE FLOWERED ARROW HEAD 

 (Sagittaria japonicafl.pl.), which is of stout 

 growth with arrow-shaped leaves and immense 

 double white flowers. It is a gem for the town 

 lake or pond. All the species of TYPHA do 

 exceedingly well in shallow water and add 

 quite a charm to the pond or lake side. T. 

 MINIMA is especially suitable where the extent 

 of water is small. 



THE WATER VIOLET (Hottonia palustris) 

 with its submerged fern-like leaves and snowy 

 white flowers is another desirable aquatic 

 plant; which may also be said of VILLARSIA 

 NYMPHyEOlDES, both excellent species where 

 the air is impure. 



Of WATER LILIES many species would 

 appear to do well, and the common yellow and 

 white have succeeded in London waters for 



