I 



114 ROCHESTER ACADEMY OF SCIENCE. f Oct. 8, ' 



1 03 1. T. maritima L. 



Common in Bergen swamp. Wayne county. I 



42S. SCHEUCHZER/A L. ! 



1032. S. palustris L. ■ \ 



Rare. In sphagnum bogs at Mendon. Wayne county. 



429. POTAMOGETON Tourn. [L.] Pond-weed. 



1033. P. natans L. 



Ponds and stagnant water ; common. 



1034. P. fluitans Roth. [P. lonchites Tuckerm.) [/*. lonchites Tuckerm.] 



Genesee river, Irondequoit bay, Long pond, etc. 



1035. P. amplifolius Tuckerm. 



Irondequoit bay. Long pond, etc. Wayne county. 



1036. P. heterophyllus Schreb. [P. gramineus Fries.) I 



Irondequoit bay, etc. ; common. ' 



1037. P. lucens L. 



Genesee river, Irondecjuoit bay, etc. ; frequent. i 



1038. P. praelongus Wulf . 



Wayne county. 



1039. P. perfoliatus L. , 



Bays, ponds and slow streams ; common. | 



1040. P. crispus L. 



Long pond. Dr. Anna H. Scaring. 



1041. P. zosteraefolius Schum. {P. compresstis Man.) 



Frequent in Irondequoit bay, Long pond, etc. j 



1042. P. pauciflorus Pursh. [P. foliosus Raf.] I 



Near Rochester, Dr. C. M . Booth. Wayne county. I 



1043. P. pusillus L. 



Irondequoit bay. Wayne county, E. L. Plankenson. 



1044. P. pectinatus L. j 



Genesee river, bays, ponds, etc.; common. i 



1045. P- Robbinsii Oakes. ^ 



Irondequoit bay, etc. ; common. 



430. ZANNIC//ELLIA Micheli. [L.] 



1046. Z. palustris L. 



Irondequoit bay, etc. ; not common. The var. pcdunculata occurs in I 



Thomas's creek, Brighton, Dr. C . M . Booth. 



431. NAIAS L. Nai/\». , ( 



1047. N. marina L. var. recurvata (?) Dudley. 



Abundant in two of the coves and sparingly elsewhere in Ironde- 

 • quoit bay. 



1048. N. flexilis Rostk. & Schmidt. \N./lexitis (Willd.) Rostk. & Schmidt.] 



Bays, ponds, etc. ; common. 



