566 FLORA OF McNAHS ISLAND, HALIFAX, N. S. — BARBOUR. 



Taraxacum officinale. — Specimens dry. Flowers closed in 

 ten minutes ; closing- complete. 



StcUdrid media and Ccrastium arrense. — Specimens dry. 

 Ill 25 minutes flowers began to droop and close slightly ; leaves 

 were unaffected. In 30 minutes flowers were closed completely. 

 No discoloration of flowers or leaves. 



Fragaria rirginiana. — Specimens dry. Kesistant. Only 

 semi-inarcotised in one hour. 



Arctostaphylos uva-ursi. — Specimens dry. Influenced only 

 slowly. Leaves discolored, but not limp, and flowers semi- 

 closed in one hour. Specimens moistened, results the same. 



Trifolium repens. — Specimens dry. Scent disappeared in 

 seven minutes. Leaves drooped i'n ten minutes and became 

 brown. In one hour the flower is seen to have its florets mostly 

 l^ung with their apices pointed outwards instead of upwards as 

 when fresh. 



Hahenaria lacera. — Specimens dry. Flaccid generally in 

 ten minutes. Flowers browii in 15 minutes. — Specimens wet. 

 Flaccid generally in 15 minutes. Flowers brown in half an 

 hour. 



Chrysanthemum leucanihcmum and O.ralis acetosella were 

 both placed with their leaves and flowers in air. but with their 

 roots in chloroform fluid. In the case of the former, the chloro- 

 form seemed to act as a stimulant; the flowers thrived in it for 

 24 hours. In the latter, however, the leaves fell in ten minutes, 

 and the flower drooped soon after. These were the only plants 

 experimented Avith in this way. 



The conclusions drawn from these few rough experiments 

 were as follows, but they must not be considered conclusive, but 

 rather as incentives to others to more accurately work up this 

 physiological section : — 



Conclusion I., is that some flowers are more sensitive to the 

 influence of the narcotic than others, and in various degrees 

 and times, even when removed from its direct influence. 



