16 THE AMERICAN BOTANIST 



shady corner of a rose greenhouse. In February 1914, fifty 

 plants ranging from one-eighth to three-eighths of an inch 

 in diameter were transplanted to two-inch pots in soil com- 

 posed of nine parts peat, one part sand, and three parts 

 broken crock. By July 1914 the plants were just beginning 

 to send out side shoots and were shifted to three-inch pots. 

 They spent that summer and the following winter plunged 

 in the ground in a shady outdoor spot. In July 1915, they 

 had reached sufficient size to be put into five-inch bulb pots 

 and in the fall of 1915 many of the plants, though not all, 

 set flower buds. After thorough freezing, two or three 

 pots, as an experiment, were brought into a cool shaded 

 greenhouse. On February 22, 1916, one plant with four 

 flower clusters was in bloom having been in the greenhouse 

 just two weeks. Others bloomed later according to the 

 treatment they received. The sensation of smelling real 

 arbutus in pots in midwinter fully repaid for the two and a 

 half years of waiting and watering. 



T 



HETEROPHYLLY IN WATER PLANTS 



HE phenomenon of heterophylly, that is, the presence of 

 two or more kinds of leaves upon the same plant, is not 

 by any means confined to water plants, but in this very varied 

 and wide class it is especially noticeable. It is useful, in con- 

 sidering the types of leaves found in aquatics, to remember 

 that although in the process of evolution the plant world is 

 supposed to have passed from water to land types, yet our 

 present flowering aquatics are all regarded as having been, so 

 to speak, crowded off the dry land and pushed back into the 



