Amphicarpaa mom . 339 



itself. The whole structure had swollen enormously ; its 

 thickness was tour times that of its former state ; its color 

 was now pink purple. Instead of firm walls, their appear- 

 ance was dow thin and tightly stretched ; even the color of 

 the seed-coats had changed. Various accidents destroyed 

 some of these fruits before the observations were completed. 



Experiments are now being carried on to ascertain more 

 regarding this remarkable physiological change, and also 

 what histological changes, if any, result. Winter forms in 

 varying stages of development, and from all portions of the 

 plant, have been buried in specially prepared receptacles, 

 containing soil and sphagnum, and these have been sus- 

 pended from the roof of the green-house. 



It is hoped, too, that some information may be obtained 

 as to the possible function of the long hairs with glandular 

 base, whose presence was mentioned above. 



As soon as possible a similar series of experiments will 

 be tried with legumes of purple, and green aerial flowers. 



(a) Legumes from Aerial Purple Flowers. 



In order to ascertain the amount of fruit resulting from 

 purple flowers, racemes were tagged while yet in the 

 bud ; others were gathered and examined after legumes 

 had developed, or were mature. Several localities were 

 then studied, and some of the records are given below. As 

 there is at least one flower in the axil of every bract, 

 results are fairly accurate. It is not possible to state the 

 definite position upon the raceme, where fruit may occur. 

 This as well as the number is exceedingly variable. 



