276 The Plant World, 



the relative humidity of hammock and pineland and its relation 

 to the development of the hammocks; the temperature, especially 

 the extremes, in hammock, pineland and glade; the influence of 

 soil moisture, insolation, etc. It seems likely that, as has been 

 demonstrated for some marshes in the North, the tops of the 

 Everglade plants are really in a semi-xerophytic location, even 

 when they are standing in water. This should be determined. 

 To work out these and other kindred questions properly would 

 require residence in the vicinity. The necessary observations 

 would be extended over a period of several weeks, if not months. 

 This paper is written in the hope that bome botanist may take 

 up the problem and carry it on to its solution. The writer 

 intended to do this but his removal from Florida makes it im- 

 possible and he hopes that some one else may find it possible 

 to spend the time necessary for these investigations. Doubt- 

 less he could make use of the buildings of the Subtropical Gar- 

 den in his work. 



Michigan Agricultural College, 

 East Lansing, Michigan. 



