12 FLORA OF WORCESTER COUNTY. 



heterophyllus, var. myriophyllus (Robbins) Morong. 



Lake Quinsigamond. 

 perfoliatus L. 



Brookfield. Mr. R. M. Harper, 

 obtusifolius Mertens and Koch. 



Beaver Brook, Worcester. 



pusillus L. Common, 



pusillus, var. polyphyllus Morong. 



Lake Quinsigamond. ( 



pusillus, var. tenuissimus Mertens and Koch. 



Lake Quinsigamond. 

 Vaseyi Robbins. 



Lake Quinsigamond. 



. gemmiparus Robbins. Common. 



foliosus Raf. 



Lake Quinsigamond. 

 confervoides Reichenb. 



Shockalog Pond, Uxbridge. 



hybridus Michx. Common. 



dimorphus Raf. Common. 



Robbinsii Oakes. 



Lake Quinsigamond. 

 Najas L. Naiad. 



flexilis (Willd.) R. and S. 



Lake Quinsigamond. T. Morong. 

 gracillima (A. Br.) Magnus. 



Lake Quinsigamond. T. Morong. 



JUNCAGINACE.E (ARROW GRASS FAMILY). 

 Scheuchzeria L. 

 palustris L. 

 Lake Quinsigamond. Prof. G. E. Stone. 



