$6 FLORA OF WORCESTER COUNTY. 



amplifolius, Tuckerm. Lake Quinsigamond. 



heterophyllus, Schreb. " " 



" " var. myriophyllus, Robbins. 



Lake Quinsigamond. 

 obtusifolius, Mertens & Koch. Beaver Brook, Worcester, 

 pauciflorus, Pursh. Lake Quinsigamond. 



pusillus, L. Common. 



" " var. tenuissimus, Koch. " 



gemmiparus, Robbins. " 



Tuckermani, Robbins. Shockalog Pond, Uxbridge. 



Robbinsii, Oakes. Lake Quinsigamond. 



Naias, L. Naiad. 



flexilis, Rostk & Schmidt. Lake Quinsigamond. 



T. Morong. 

 Indica, Cham., var. gracillima, A. Br. Lake Quinsigamond. 



T. Morong. 



ERIOCAULE^. 



Eriocaulon, L. Pipewort. 



septangulare, With. Borders of ponds, not rare. 



CYPERACE^. 



Cyperus, Tourn. Galingale. 



diandrus, Torr. Low grounds. 



filiculmis, Vahl. . Dry soiL 



dentatus, Torr. Margins of ponds, not rare. 



strigosus, L. Swamps. 

 DuLiCHiuM, Pers. Dulichium. 



spathaceum, Pers. Swamps. 



