6 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



specimens in some herbarium. Great effort has been made to 

 insure accuracy in the determination of all doubtful specimens. 

 Some localities, however, rest upon the authority of collectors 

 alone, when the species is once definitely admitted and there is 

 no reason to doubt identity. It has been necessary to exclude a 

 number of species found in previous lists, because of the absence 

 of any authentic specimens. Errors of determination and changes 

 in classification account for a large proportion of such excluded 

 names, while there remain a few that probably really belong to 

 our flora but are waiting to be rediscovered. A list of such ex- 

 cluded plants will be found at the end of the work. There also 

 will be found other data bearing upon the flora as a whole. 



In the present unsettled and perplexing state of nomenclature, 

 it is believed that necessity exists for strict adherence to a single 

 standard to avoid still greater confusion. In Gray's Manual, 7th 

 edition, will be found a discriminating application of the rules and 

 usage adopted by the International Botanical Congress, at Vienna, 

 in 1905. This usage has been productive of the least change in 

 plant names, thereby proving particularly well adapted to the 

 purpose of this Catalogue. Moreover, by accepting this Manual 

 as our guide we are enabled to eliminate all descriptive matter 

 by referring the reader to that work. To facilitate general 

 reference, however, important synonymy is given so that there 

 need be little difficulty in coordinating names.* 



Common or English names have been given considerable 

 attention, yet it is probable that many others are in use, some, no 

 doubt, by children or others of an observing nature. It is 

 desirable to increase our knowledge of such usage. The same 

 may be said of the folk-lore of our plants and of such traditional 

 knowledge of their medicinal and other uses as has come down 

 to us from earlier generations or from the aborigines. 



The data relative to times of flowering and fruiting have 

 been compiled from carefully kept records supplemented by 

 herbarium material, and represent the normal habits of the plants 

 in our region ; yet the varying conditions of altitude, exposure, 

 moisture, light, season, etc., have great influence in modifying 



* In a few instances we have used, instead of the names given in the 7th edition 

 of the Manual, the names published by the editors of the Manual in a list of emenda- 

 tions in Rhodora, vol. ii, no. 123, March, 1909. 



