Ohenopodium ambrosioides, L. var. anthelminticum, Gray. 



Croton capitatus, Michx. 



Avena fatua, L. 



Of those here much beyond their assigned limits, three show decidedly 

 weedy tendencies. They are Solamum rostratum, Dysodia chrysanihem- 

 oides and Parthenium Hysterophorus. The two last named promise to 

 become permanent additions to our flora, undesirable though they may be. 



The circus is at present in Australia and we shall watch with interest to 

 secure anything that may be brought from there. 



Biological surveys. By Johx M. Coulter. 



Some stran(;e developments of stomata upon Carya alka caused by 

 Phylloxera. By D. A. Owen. 



[abstractJ. 



Upon the upper side of the leaf of Carya alba are found some hemispher- 

 ical and conical galls produced by the little insect Phylloxera. These galls 

 are the receptacles for the eggs, or nest of these insects. 



The stomata in leaves uninjured are all found upon the lower surface. 

 But in those containing galls there are seldom any stomata found in the 

 epidermis just beneath the gall. The upper side is entirely free from sto- 

 mata with the exception of the gall itself. In no case was any gall exam- 

 ined in which stomata were not found upon the upper surface. And with 

 but one or two exceptions no stomata were found upon the under surface 

 just beneath the gall. 



Surrounding and within the opening of the gall upon the under side of 

 the leaf minute hairs were found, all extending outward as if to guard the 

 opening against the entrance of an enemy. 



There seems, from the above, to be an intimate relation existing here be- 

 tween the plant and animal. 



Preliminary paper ox the flora of Henry' county, Ind. By T. B. Red- 

 ding and Mrs. Rosa REoniNG Mikels. 



