THE HAMILTON ASSOCIATION. 101 
BIOLOGICAL NOTES. 
The following plants have been added to the local list 
since the last report was issued : 
Erythronium albidum Nutt. 
Jeffersonia diphylla (L) Pers. 
Viola rotundifolia Michaux. 
Mertensia Virginica (L) D.C. 
Galinsoga parviflora Cav. 
Specimens of Pterospora Andromedea Nutt. and Hypo- 
pitys Hypopitys (L) Small, reported by Judge Logie in 1860, 
but not observed by any workers during the interval, have 
been collected. Several violets are reserved for complete 
identification. 
J. M. Dickson. 
