126 STATE HOETICULTUKAL SOCIETY 



1555. 8. androcladum, (Engelm.) Morong. Branching Bur- 



Reed. 

 In wet places ; not common. 



1556. 8. simplex, Huds. Simple Stemmed Bur-Reed. 

 Borders of ponds and streams. 



NAIADACE-ffi. PONDWEED FAMILY. 

 POTAMOGETON, L. 



1557. P. natans, L. Common Floating Pondweed. 

 In ponds, infrequent. 



1558. P. amplifolius, Tuckerm. 

 In ponds, infrequent. 



1559. P. loncliites, Tuckerm. Long Leaved Pondweed. 

 Not common. 



1560. P. lonchites, Tuckerm. Long Leaved Pondweed. 

 Frequent. 



1561. P. illincensis, Morong. Illinois Pondweed. 

 Frequent. 



1562. P. prcelongus, Wulf. White Stemmed Pondweed. 

 Not common. 



1563. P. perfoliatus, L. Clasping Pondweed. 

 Infrequent. 



1564. P. perfoliatus richardsonii, A. Bennett. Richardson's 



Clasping Pondweed. 

 Frequent. 



1565. P. zoster cefolius, Schum. Eel-Grass Pondweed. 

 Not common. 



1566. P. foliosus, Raf. Leafy Pondweed. 

 Common. 



1567. P. foliosus niagarensis, (Tyckerm.) Morong. 

 In swift running water; infrequent. 



1568. P. friesii, Ruprecht. Frie's Pondweed. 

 Infrequent. 



1569. P. pusillus, L. Small Pondweed. 

 Not frequent. 



1570. P. spirillus, Tuckerm. Spiral Pondweed. 

 Infrequent. 



