124 LIVING PLANTvS 



from the soil in woods in October, and placed 

 in a cold house until Februar3^1st, when they 

 were placed in a temperate room, beginning 

 growth two weeks later. Ordinarily the 

 plant sends up one or two leaf-stalks thirty 

 to fifty centimeters in height bearing the tri- 

 foliate lamina, with an area of one hundred 

 to two hundred and fifty square centimeters 

 and a scape twenty to forty centimeters in 

 height, bearing a spadix enclosed by a hooded 

 spathe. The hood contains a large proportion 

 of chlorophyll and sustains in greater part 

 the functional activity of the leaf, and exhibits 

 similar reactions to light and modified atmo- 

 spheres. The correlation of growth is such 

 that the scape and inflorescence attain full 

 size within ten days from the opening of the 

 bud, and the greater part of the leaf-expansion 

 follows in the next ten days. During the first 

 ten days the starch stored in the corm is drawn 

 upon to furnish an increasing amount of ma- 

 terial for the growth of the aerial organs; 

 during the next ten days a decreasing amount 

 is drawn from the corm, and usually after 

 that time a stream of plastic material sets in 

 the opposite direction from the laminae, which 

 is in part stored in the corm and in part used 

 in the development of the lateral offshoots, 

 which begin development at this time. 

 Buds which had attained the height of ten 



