92 
, Potamogetons in Western New York. — While spending a few 
days of the summer of 1882 in Western New York, I examined some 
of the lakes and streams of Wyoming, Genesee and Livingston 
Counties for species of Fotamogeion. The results are given below, 
with the reservation, however, that they do not profess to be ex- 
haustive, since time enough was not at my command at every locality 
to attain this end. The examination was carried far enough to see 
that the waters of that region still need to be searched more care- 
fully than has yet been done to obtain a complete knowledge of the 
geographical distribution of these difficult and somewhat neglected 
plants. 
The localities chiefly noticed were Silver Lake and its outlet at 
Perry, Wyoming County, Hemlock and Conesus Lakes, Livingston 
County, and Oatka Creek and several smaller streams of Genesee 
and Wyoming Counties. Fourteen species were found with consid- 
erable variation on the part of some, and are as .follows: 
P. nutans^ L., Silver Lake and Oatka Creek. 
P. Claytonit, Tuckerman. Same localities, and Hemlock Lake 
and its outlet. 
P. spirilltis^ Tuckerman. Hemlock and Conesus Lakes. 
P, lonchiteSy Tuckerman. Hemlock and Conesus Lakes. 
P. amplifoliuSy Tuckerman. Oatka Creek and the three lakes. " 
P. gra7niniuSy L. Some forms belonging to the variety hetero- 
phyllus^ Fries, and others that are difficult to bring under the head of 
any varieties given in the books, the species being so polymorphic. 
Conesus Lake and Oatka Creek, 
P. lucens^ L. Oatka Creek, 
jP. perfoliatus^ L. Either the variety lanceolatus^ Robbins, or in- 
clining to this, though some forms have very short leaves. The 
three lakes and Oatka Creek. 
P. zoster ^folius, Schumacher {P, compressus, L. [ex Fries,] ) 
Silver and Hemlock Lakes. 
P.pauciflorus,Y\xx^\. Silver Lake and Oatka Creek; also abun- 
dant in brooks and pools. 
P. lateralis, Morong. {^Bot, Gaz,, May, 1880.) Hemlock Lake. 
P. pusillus, L. Principally the variety vulgaris. Fries. Silver, 
Hemlock and Conesus Lakes. 
P. pectinatus, L. Silver, Hemlock and Conesus Lakes. 
P, marimis, L. Hemlock and Conesus Lakes. 
Notes.— /^. Claytonii. Those taken from Oatka Creek, near the 
village of Wyoming, had remarkably long floating leaves like some I 
had found at Ludington, Mich. They were in some cases 4-4^ 
inches long, and the petioles of these and of specimens from Silver 
Lake were usually from 1-2 inches long. 
P. ampUfolius was one of the most common species, being found 
quite generally in all mill-ponds and lakes, and streams whose depth 
was sufl[icient for its growth. 
P. paucifloriis. This was the only species seen in brooks and in 
Oatka Creek, between Warsaw and Wyoming, with one exception 
(/^. Claytonii), It commonly occurred in nearly all pools and 
brooks where the water, supplied by springs, or oozing out from 
