28 SYRACUSE BOTANICAL CLUB'S COLLECTION 



NAIDACE/E— Lindl, 1 836— Pondweed Fam. 

 POTAMOGETON— Lin, 1753. 



P. NATANS — Lin., 1753. Common Floating Pondweed. 

 Common. Very slender. A deep impression in middle 

 of nutlet. Ponds and stagnant waters. Tully Lake, 

 July and August, 1896. 



P. Oakesianus — Robbins, 1867. Oakes Pondweed. 



Frequent. Similar though much smaller than P. Natans 

 in every part. Ponds and ditches. Valley, August, 98. 



P. amplifolius — Tuckerm, 1848. Large-leaved Pond- 

 weed. 

 Common in most of our lakes. Leaves large. Stipules 

 long and sharp-pointed. Onondaga Lake, Aug., 1899. 



P. NUTTALII — Cham, 1827. (P. Claytonia — Tuck, 18 A3.) 

 Nuttall's Pondweed. 

 Occasional. Streams and ponds. Floating leaves, ob- 

 ovate; submerged, linnear. Tully Lake, Aug., 1891. 



P. ALPINUS — Balbis, 1804. (P. rufesceno — Schrad, 1815.) 

 Northern Pondweed. 

 Frequent. Ponds etc. Hoyt Pond, 1896. 



P. LONCHITES — Tuck, 1848. Long-leaved Pondweed. 



Occasional. Floating leaves, pointed both ends; sub- 

 merged leaves, long, wavy and pellucid. Slow streams 

 etc. Clay, 1896. 



P. HETEROPHYLLUS — Schreb, 1771. Various-leaved Pond- 

 weed. 

 Common. Floating leaves, pointed at apex, rounded at 

 base. Submerged, linear lance. Streams and ponds. 

 Tully, Aug., 1895. 



P. LUCENS — Lin., 1753. Shining Pondweed. 



Frequent. Ponds etc. Leaves all submerged, shining 

 above. Tully Lake, July, 1895. 



P.""^ PRAELONGUS — Wolf , 1805. White-stemmed Pondweed. 

 Leaves all submerged. Fruit keel shaped. Seneca 

 River, summer, 1895. 



