o 



01 



meetings reported in favor of holding a second meeting on the 

 fourth Wednesday evening of each month, and proposed an 

 amendment to the By-Laws in order to make this feasible. 



Mr. Sterns described the so-called bulblets of Lycopodiiun 

 hicidiLliun, and exhibited a stalk of Angelica atropm^piirea four 

 and one-half feet long, averaging four inches in circumference, 

 weighing but one and three-fourth ounces, remarking that it was 

 doubtful if any other North American plant yielded a stem of 

 equal dimensions and yet weighed so little. 



Dr. Rusby showed Prenanthes racentosa^ both typical and the 

 van pinnatifida, from the Hackensack Meadows, New Jersey. 



Dr. Britton read the announced paper of the evening, *' On 

 the Genus Hicoria of Rafinesaue. 



At the adjourned meeting oi October 24th, the President was 



in the chair, and 32 persons present. Mr. Sterns acted as Sec- 

 retary. 



Dr. Northrop exhibited thin sections of Cusctiia Gronovii 

 growing on Impatiens biflora^ and containing a green substance, 

 apparently chlorophyll. This substance was confined to the por- 

 tions of the Dodder in contact with the host-plant or with itself, 

 the rest of the parasite being of the usual orange color. The 

 green pigment was apparent in the stems to the naked eye, which 

 led to its detection. 



Jahresb 



(^^)> 436 and 417, where the same occurrence is reported in a 

 European species. Prof Schrenk remarked that searching tests 



should be applied before deciding that it was common chloro- 

 phyll. 



Mr. Sterns exhibited a long shoot of some species of wild 

 ^ose, on which more than half the prickles were arranged in a 

 uniform and orderly fashion, three to each internode — an infra- 

 stipular pair, and another qhq lower down on a line with the mid- 

 vein of the leaf above. He remarked that a different but equally 

 definite arrangement of prickles is often observable in Smilax 

 ^otundifolia, namely, two pairs placed near the middle of the in- 

 ternode and alternating in position and direction with the adjacent 

 leaves. 



