57 



ZANNICHELLIA, Micheli. 



Z. palustris, L. HORNED POND-WEED. 

 A brook in Polpis fairly choked with it, C. & D. Hummock 

 and Miacomet Ponds, Morong. 



ZOSTEBA, L. EEL-GRASS. 



Z. marina, L. 



Capaum Pond, and in the sea. 



RTJPPIA, L. D'ITCH-GRASS. 



R. maritima, L. 



Common in salt and brackish ponds. 



POTAMOGETON, Toum. POND-WEED. 



P. Oakesianus, Robbins. 



Very common in the island ponds and finely fruiting. 

 P. Claytonii, Tuckerm. 



Maxcy's Pond, and in a fresh water pool near Sesachacha. 



W. Deane. 

 P. hybridus, Michx. 



Maxcy's and Reed Ponds. C. & D. 

 P. pulcher, Tuckerm. 



Quite common and finely fruiting. In fine fruit in small 



pond near Orange St. R. R. crossing. Judge Churchill. 

 P. perfoliatus, L. 



Abundant in Long, Hummock and Miacomet Ponds. 

 P. pusillus, L. 



Hummock, Reedy and Long Ponds. In the last it grows 



rankly, and with some other aquatics chokes the water. 

 P. pectinatus, L. 



Common in salt and brackish ponds. 



ALISMACE^E. 



TRIGLOCHIN, L. 



T. maritimum, L. ARROW-GRASS. 

 Common on the salt marshes at Eatfire and elsewhere. 



