1901.] 



NATUKAL SCIENCES OF PHILADELPHIA. 



315 



Arissema triphylluni (Indian Tuniip). 



Two plants were collected in the woods at Shawmont, Pa., grow- 

 ing under exactly similar conditions of soil and light exposure. 

 The following measurements present in a statistical manner the 

 variations which occur in the leaves and other parts of the two 

 plants. The number of perfect fruits depended upon the success 

 of the process of fertilization. The number of seeds in each 

 berry varies from 1 to 4 in number: 



IX. Ariscema triphyllum {tioo plants). 



X. Arismma triphyllum {leaves of two plants). 



Ampelopsis Veitchii (Japanese Ivy). 



The measurements of the leaves of this plant are presented in 

 Table X. The young plants have normally trifoliate leaves and 

 unifohate ones interspersed. The seedlings always have trifoliate 

 leaves without any unifoliate ones. This points to the ancestor of 



