rare southward and westward. Common on the Ontario Plain 

 and in swamps of the Mohawk drainage, but in the herbarium 

 of Cornell University represented from the southern tier of 

 counties only by the collections cited. 



This species forms dense stands on the marly flats along the 

 Cohocton River. Associated with it are Abies halsamea (C & T 

 2697) and Larix laricina (C & T 2692). In the moss under the 

 white cedars, Mitella nuda (C & T 2691) is frequent. Other 

 associated species are Carex flava, Salix Candida, Myrica Gale, 

 and Viburnum Opulus. 



PoTAMOGETON BUPLEUROiDES Fernald. Schuyler Co.: in 

 shallow water at southeast corner of Waneta Lake, 1934, C 

 1321. 



In the Cornell Herbarium, this species is otherwise repre- 

 sented from south-central New York only from Cayuga and 

 Seneca Lakes. It was neither collected by McVaugh (1938) in 

 the Chemung and Allegheny watersheds, nor by Muenscher 

 (1936) in the Susquehanna watershed. 



Zannichellia palustris L. Steuben Co.: Cohocton River 

 about one mile west of Atlanta, 1937, C & T 2687. Reported as 

 very local in the Delaware and Susquehanna watersheds by 

 Muenscher (1936) and from only one stream. Tributary 22 of 

 the Chemung River south of Elmira, by McVaugh (1938). 



PoA NEMORALis L. Westchester Co.: dry wooded ridge, 

 Crestwood, Yonkers, 1935, R. Osgood & C 1759. Reported by 

 Taylor (1915) as a waif, by Wiegand and Eames (1926) as 

 scarce in the Cayuga Lake Basin, and by House (1924) as rare 

 as an introduced plant in waste places or on ballast, Staten Is- 

 land and Yates County. 



PoA SALTUENsis Fernald & Wiegand. Tompkins Co.: Caro- 

 line Depot, 1935, C 2161 & 2162; Ringwood, 1935, C & E. 

 Lawn 2138. 



The three collections cited are of interest because they dem- 

 onstrate the unsatisfactory nature of the anther and ligule 

 characters which have been used, along with the nature of the 

 flowering glumes, to separate P. saltuensis from P. dehilis. 

 Fernald and Wiegand (1918) describe the anthers of P. dehilis 

 as 0.6-0.8 mm. long and the longer cauline ligules as 2-2.5 mm. 

 long, while for P. saltuensis they give measurements for anthers 

 as 1-1.2 mm. long and for ligules as 0.3-1.5 mm. long. In C 



