72 [Assembly, 



(D.) 



NOTES AND OBSERVATIONS. 



THALICTRUM PURPURASCENS, L. 



A singular Thalictrum was found on the shore of Lake Cham- 

 plain, near Port Henry. Its leaves were thin and delicate, quite 

 small, and five to seven-lobed, resembling those of Thalictrum 

 dioicum. Some had a general petiole, others had none. The 

 flowers were almost dioecious, the anthers resembling those of 

 Thalictrum purpurascens, though perhaps they were a little more 

 slender and more strongly mucronate. The plants had the general 

 aspect of T. purpurascens, except the leaves, which resembled 

 more those of T. dioicum. T dioicum in the same locality was past 

 flowering, it being now the middle of June, and had developed its 

 fruit to full size. Whether this plant is a hybrid between 

 T. dioicum and T. purpurascens, or a variety of the latter, or a 

 distinct species, is the question to be solved. Similar forms have 

 been regarded by Prof. Trelease as hybrids. 



NASTURTIUM LACUSTRE, Gr. 



Black creek, near Bergen. 



ARABIS DRUMMONDII, Gr. 



Port Henry. A form with spreading pods. 



GEUM RIVALE, L. 



A form with pale yellow or cream-colored flowers was collected 

 in the Adirondack mountains. It is not rare in that locality. 



RIBES CYNOSBATI, L. 



A very lax form of this plant occurs at Cascadeville, in the 

 Adirondack mountains. The branches are long and slender, and 

 the flowers are much scattered and very long pedicelled. It is 

 associated in this locality with Ribes rotundi folium^ R. lacustre 

 and R. prostratum. All were in flower at the same time. The 

 last species occurs abundantly at Lower Ausable pond, where 



