5(J4 FLORA OF McXAB'S ISLAND, HALIFAX, N. S. — BARBOUR. 



(^ypripcdium acaule. — Specimens dry when placed in 

 cliamber. Affected in five minutes ; the other greenish lobes, the 

 perianth, becoming discoloured and droop. Other effects 

 proceed very slowly indeed, it taking two to three hours to bring- 

 results. Curious to say, the flowers transpired more or less 

 under the influence of the narcotic, and the fin.il result is diffi- 

 cult to obtain, — complete anaesthesia as it were. 



Hieracium canadenis. — Specimens di*y. Flowers began to 

 be influenced in 15 minutes. Completely under influence in 

 20 minutes. Stems below the head absolutely limp, so that the 

 flower head hung sharply do^Vn, The strap-like rajs became 

 dark yellow, but not closed as in sleep ; they remained one-half 

 to one-third open, and slightly curled on themselves. Another 

 curious effect was observed in this plant, that when a 

 specimen was placed dry, and just as it had been plucked, and 

 not under the influence of the narcotic, in a chamber free from 

 narcotic, but in which also was a narcotised orchid, this latter 

 plant seemed to affect the hawkweed, which l>ecame drowsy and 

 closed as in sleep, more or less. 



Potent ilia tormentosa. — Specimens used dry. In ten 

 minutes the leaves were affected. The flowers closed in twenty 

 minutes. 



D7'osera rotuiulifolia. — Specime'ns dry. In ten minutes 

 leaves became flaccid and curled backwards. The tentacles 

 became irregularly twisted and crossed. Recovery from 

 influence took place if flower was placed in soil after a time, 

 which was most unusual in those flowers I experimented upon. 



Specimens moistened or wet. Flowers more tardy about 

 coming under influence of the narcotic. At the end of fifteen 

 minutes, slight discoloration, but no closing of flowers or droop- 

 ing of the tentacles for fifteen minutes more, and then it was 

 incomplete. Leaves behaved as in previous experiments. Here 

 again the results differed from those obtained when ordinary 

 stimuli are applied. 



