ORDER OF COLOR CHANGE 



vitality is brought about by diminution of light, 

 lowering of temperature, and probable causes 

 in the plant itself. 



** The red coloration is brought about in a very 

 different way, as erythrophyll, or red dye, is 

 manufactured in the leaf, and stains the cell 

 sap, leaving the chlorophyll masses untouched. 

 This red coloring matter cannot be discovered 

 in any of the crude materials brought into the 

 plant or in any other part of the leaf, except 

 rarely in the petiole. When the leaf is ready to 

 fall and the chlorophyll bodies die the erythro- 

 phyll lays hold of the cell wall and solid con- 

 tents and stains them. In this way dried leaves 

 retain their red color. As erythrophyll is soluble 

 in water, contact with moisture will soon cause 

 the most of it to disappear." 



III. ORDER OF COLOR CHANGE 



This grouping of trees in the order of colora- 

 tion is that given in the Seventh Report of the 

 Forest, Fish, and Game Commission of the State 



137 



