LIBKAKV 



NEW VUKK 



BOTANICAL 



GARDEN 



TORREYA 



Vol. 23 No. 4 



July- August, 1923 



NOTES OX THE DESMIDS OF NEW YORK 



Clarenxe J. Hylaxder 



During the summer and autumn of 1922, the writer was 

 enabled to make a few collections of desmids at several localities 

 in New York state. These collections were not particularly 

 fruitful, and did not yield any new species, yet so little has been 

 done on this family of plants in this state that the writer feels 

 that there is some excuse for such a short report as this. It is 

 hoped that this will be the first of a series of notes on the New- 

 York Desmidiaceae. For with the exceedingly varied topo- 

 graphy, ranging from the alpine lakes of the Adirondacks to the 

 sand hill ponds of Long Island, the desmid flora of this state 

 ought to present a diversified and interesting assemblage of 

 species. 



Of the previous papers on the subject, we might mention 

 two, both of which are very brief. J . W. Bailey in 1 846 published 

 an article in the American Journal of Science and Arts (II, i: 

 126-127), entitled "Some new species of American Desmidiaceae 

 from the Catskill Mountains." This contains an account of 

 only a few species, as might be expected when one considers the 

 state of knowledge on the Desmidiaceae at that time. The 

 other paper is by J. A. Cushman and was published in 1903 

 (Bull. Torrey Club 30: 513-514), — entitled "Desmids from 

 Bronx Park, New York." This report also is brief, although it 

 includes a greater number of species than Bailey's report. 

 Nineteen species are recorded, the majority of which are Closteria 

 and Cosmaria. 



Four localities, involving four separate collections, form the 

 basis of this report. They are as follows: Sept. 29, Port Henry, 

 Essex county, on Lake Champlain; Sept. 30, Crooked Lake, 

 Rensselaer county, and Grafton, Rensselaer county; Nov. 20, 

 Scarsdale, Westchester county. 



I. Collection at Port Hexry 



The material here was collected from floating masses of 

 weeds and Myriophyllum which formed a tangled mat entirely' 



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