AND VICINITY. 137 



After Gr. crinita, p. 65, the species : 



detonsa, Fries. Shortened-fringed Gentian. 



On the very verge of bluffs along Lake Ontario west of Irondequoit bay, and 

 on shaded moist sides of ridges, with Campanula rotundifolia and G. quin- 

 queflora : low, one to four inches high, one-flowered, most beautiful and 

 delicate plants chiefly, hut sometimes higher, and in all respects the same 

 with the form on the wet rocks of Niagara falls. Rare. August, September. 



On G. alba, the remark : 



This plant, which is also abundant in marshes about Owasco lake, may be 

 a white-flowered form of G. andrtwsii. 



After Polygonum aviculare, var. erectum, p. 69, the species : 



tenue, Michaux. Slender Polygonum. 



Common on the dry shady rocky steeps between Yost's and Palatine bridge, 

 Montgomery county. Scarce. July - October. 



To P. articulatum, the stations : 



Abundant in wastes of clear sand between Albany and Schenectady, near 

 Centre station, where sometimes the plants are very large, two feet high. At 

 Oneida lake, it may be found along the shore near the mouth of Fish creek, 

 in sandy copses. Oak openings of Charlotte, Monroe county, Bradley. 



To Ceratophyllum demersum, var. echinatum, p. 71, the range: 

 Common in the waters of the western part of the State and Lake Ontario. 



To Euphorbia polygonifolia, the range : 



This plant proves to be as common on the shore of Lake Ontario as on the 

 Coast itself, from Oswego county to Braddock's point, Monroe county. 



To Populus monilifera, p. 77, the stations : 



Common along the shore of Lake Ontario, from Sodus point, "VYayne county, 

 to Braddock's bay, Monroe county; always near the water, and occupying 

 the narrow sandy elevations separating bays, ponds, inlets, marshes from the 

 Lake. 



On a low point running out into Sodus bay there is a long grove of these 

 trees, of a medium height, however, and not over a foot in diameter. But 

 over the ridge against Long and Cranberry ponds there are many fine lofty 

 specimens fifty or sixty feet high, and more than three feet through. 



A few trees occur, also, along the outlet of Canandaigua lake, Ontario 

 county, having quite small deltoid leaves, the lower ones on the twigs as 

 broad again as long sometimes; young branches one-half or three-fourths of 

 an inch in diameter, slightly winged, and a red willow-like bark. 



The species : 



angulata, Aiton. Angled-stemmed Populus. 



Eeplaces the common form at Braddock's bay, Monroe county; and appears 

 quite frequently in the town of Gorham, Ontario county. Rare. 



To P. balsamifera, the range : 



Occasional from a few large trees at the mouth of Genesee river opposite 

 Charlotte, to the base of Cranberry pond. Monroe county, where there are 

 clusters of young and middle-sized growth. 



To Typha angustifolia, p. 79, the range : 



Bogs along the berm-bank of the Erie canal in Montgomery county. 



To Sparganium eurycarpum, the range : 



Common in the marshes of Lake Ontario, bordering all bays and inlets. 



To Lemna Gibba, p. 80, the range : 



Bays and inlets of Lake Ontario, from marshes northeast of Oswego to 

 Braddock's bay, Monroe county, commonly covering the water in dense 

 patches : easily distinguished by its thickness, being lens-shaped, arched 

 aboved, below inflated and cellular. 



