perature whenever the flowers opened. A collection 

 made in Ohio early in January after the unopened buds 

 had endured a week of very cold weather, with the mer- 

 cury as low as - 15° Fahr. , sprouted in a seemingly 

 normal way, though not so vigoroiisly as earlier. I am 

 inclined to think that pollen shed so late never fer- 

 tilizes, however. 



Conduct iv e Tis sue of the Style and Ovary . - 



By the folding of the carpels each style has a 

 groove formed between the edges of the folded carpel. 

 This groove leads from the stigma to the ovary, it is 

 open at the top, where its sides are slightly separat- 

 ed and its inner surface thus exposed, bears the loose- 

 ly arranged pappilose cells of the stigma. The epider- 

 mis of this groove, and two subepidermic layers contin- 

 ue this stigmatic tissue down to the base of the fun- 



