AND VICINITY. 81 



ZANNICHELLIA. Micheli. Horned Pondweed. 



palustris, L. Marsh Zannichellia. 



Rivulets, marshy shores. Salina and Onondaga lake. Near Penn-Yan, 

 Sartwell. Rare. August - October. 



RUPPIA, L. Tassel Pondtveed. 



maritima, L. Seaside Ruppia. 



Borders of Onondaga lake along the east side. It is fruitful in shallow water, 

 two to five feet in depth. 



In deep water, in company with Najas 'major, a very large form grows, 

 many feet in length, bearing wide leaves, but nowerless and fruitless. 



This plant and its companion are new to the interior, having been known 

 hitherto as exclusively maritime. Their presence here is proof, first, that the 

 sea originally came up to or covered the place ; and second, that these plants 

 were flourishing at that time. July - November. 



POTAMOGETON, Tournefort. Pondweeds. 



PECtinatus, L. Pectinate-leaved Potamogeton. 



Rivers and lakes. Albany, Beck. Schenectady, Pearson. Near "Watertown, 

 Gray, Torrey Fl. N .Y. Pools along Oriskany creek. Abundant in Onondaga 

 lake. Crooked lake, Sartwell. Rare. 



robbinsii, Oakes. Discovered by Robbins. 



Ponds. At the head of Onondaga lake, in the inlet of the creek. Rare. 



pusillus, L. Small Potamogeton. 



Borders of lakes, standing waters. East Dry-lot pond, south Herkimer 

 county. Crooked lake, Yates county, Sartwell. Rare. 



PAuciFLORUS, Pursh. Feiv-jlowered Potamogeton. 



Standing water along streams ; canals. Common. 



Compressus, L. Flat-stemmed Potamogeton. 



Slow waters. Outlet of Canaderaga lake, Otsego county, where it abounds. 

 Sander's lake and the Mohawk. Pearson. River St. Lawrence at Alexandria 

 bay. Yates county, Sartwell in herb. Ham. Coll. Uncommon. 



perfoliattjs, L. Perfoliate Potamogeton. 



Canals, ponds. Common. 



PR^LOngus, Wulfen. Long-pedimcled Potamogeton. 



Still deep water. Alexandria bay, Jefferson county, at the mouth of the 

 creek : peduncles eighteen inches in length. Scarce. 



LUCENS, L. Shining-leaved Potamogeton. 

 Bottoms of ponds in shallow water. Frequent. 



var. FLUiTANS, Gray. Floating Potamogeton. 



Ponds in deep water. Abundant. 



NATANS, L. Swimming Potamogeton. 



Lakes, rivers. Common. 



heterophtllus, Schreb. Various-leaved Potamogeton. 



Shallow ponds and borders of lakes. Head of Seneca lake, Gray. Common. 



ALISMACE^. Water-plantains. 



TRIGLOCHLN, L. Arrow-grasses. 



palustre, L. Marsh Triglochin. 



Boggy borders of Onondaga lake; at Salina, and northward beyond Liver- 

 pool. Abundant in water-covered places of moss or marl, in the "West Ber- 

 gen swamp, Genesee county. Rare. June - August. 



