1896 | BOTANICAL PAPERS AT BUFFALO 243 
motion. This mechanism has been developed by the reaction 
of the plant organ toward its environment. But it is almost 
certain that the mechanism may be started by other stimuli than 
those to which it has developed a special correspondence. If 
this be true we may look for responses in plants and animals 
that are not to their particular advantage. However this may 
be, the investigator is interested in all irritable responses, use- 
ful to the plant or not useful, for it is only by studying all phe- 
homena that we may go a step farther toward solving the intri- 
cate problems of irritability. 
HERMANN VON SCHRENK: Some adaptations of shore plants to 
respiration — The paper treats about equally the following topics: 
(2) the different shore plants, classified according to proxim- 
ty to water (aquatic plants are not considered); (2) the neces- 
sity of modified structure to meet new conditions; (¢) the 
modifications thus caused in the form of water lenticels and the 
peculiar tissue, aerenchyma; (d@) inconstant occurrences of the 
latter on many plants and reasons therefor; (¢) discussions as 
to what the meaning of this power of adaptation in certain 
plants may be. 
D.T. MacDoucar: The mechanism of curvature in tendrils— 
The curvatures of tendrils in response to contact stimuli are due 
: nots of the concave side. The coiling of free por- 
ons of tendrils is due to excessive growth of the convex side 
ee cc processes are entirely independent, and the second 
Y be influenced to a minor extent only by the first. 
— B. Copetanp: A contribution to our knowledge of the 
of the thee growth and turgor.—The paper gives an account 
hia. of turgor of seedlings of Vicia Faba, grown at very 
ent — presented by means ofatable. High turgor 1s pres- 
Stowth is slow and vice versa. The turgor of Lupinus 
 Hormal, etiolated, and deprived of CO,g, is discussed. Pre- 
Venti ‘ ; 
‘on of growth is accompanied in this plant also by high 
