278 Scliively — Contributions to the Life History of 



place. As quite satisfactory results were obtained in germi- 

 nating these, this method of preserving the seeds is recom- 

 mended. All experiments described, were conducted in the 

 greenhouses of the Botanic Garden of the University of 

 Pennsylvania. The temperature ranged from about 20 C. 

 to 36 C., probably averaging 27 ° C. 



Upon October 14, 1895, twenty terrestrial seeds and the 

 same number of aerial were planted. Several aerial ap- 

 peared in the course of three weeks, but no terrestrial. All 

 of the latter germinated, however, during January, 1896. 



Upon December 16, 1895, thirty-two seeds of each kind 

 were planted. An aerial seed first appeared within ten 

 days ; about December 30, several terrestrial seeds showed 

 themselves above ground. By January 18, 1896, twenty- 

 six terrestrial and four aerial seeds had developed. After 

 this, at irregular intervals, the remainder of the terrestrial 

 germinated. Result, 100 per cent, terrestrial; 12^ per 

 cent, aerial. 



On January 4, 1896, twenty terrestrial seeds were planted 

 as follows : Ten, one inch below the surface ; ten, two 

 inches below the surface. On the same date, twenty-five 

 aerial seeds were planted, ten, one inch below the surface ; 

 ten, two inches below the surface, and five, one-half inch 

 below the surface. On January 18th, one aerial (1 inch) 

 had appeared above ground ; investigation showed that one 

 terrestrial (1 inch) had germinated, though no shoot was 

 visible above ground. 



After this results were as follows : 



Plants above ground. 

 Jan. 21st. 



1 Aerial (1 inch). 



1 Terrestrial (1 inch). 



Plants above ground. 

 Jan. 29th. 



1 Aerial (1 inch). 



4 Terrestrial (1 inch). 



2 Terrestrial (2 inches). 



Plants above ground. 

 Feb. 1st. 

 2 Aerial (1 inch). 



5 Terrestrial (1 inch). 



6 Terrestrial (2 inches). 



Plants above ground. 

 Feb. 5th. 

 2 Aerial (1 inch). 

 6 Terrestrial (1 inch). 

 10 Terrestrial (2 inches). 



