49 



June 20th to July 1st 



Potamogeton coui'ervoidos, lieiclu'iih, 



Ponds, pools, and ditclies. 

 *Oakosianus, "Robbins. 



Ponds, pools, and ditches. 

 *natans, L. 



Ponds, ])()()ls, and ditches. 

 lietei'oi)liylliis, Schreb. 



Ponds, pools, and ditches, 

 americanus, C. & S. 



Ponds, pools, and ditches. 

 *epihydrus, Raf. 



Ponds, pools, and ditches. 

 *Robl)insii, Oakes. 



Ponds, pools, and ditches, 

 pectinatus, L. 



Island ot" Penekese. 

 Riii)pi;i maritima, L. 



Shallow water and ditches. 

 Zostera marina, L. 



Salt water near shore. 

 Zannichellia palustris, L. 



Stream from Turner's j\Iill. 



Chara flexis, 



Urtica gracilis. Ait. 

 nrens, L. 



Acush. Riv. near upper res. 

 Urticaceoe. 



Near dwellings. 



Near dwellings. Nat. f. Eu. 

 Sci'oplmlariacete. 



Pondweed. 



Ditch Grass. 



Eel-grass. 



Horned Pondweed. 



Chara. 



Nettle. 



Veronica scutellata, Tj. 



Bogs and marshes. 

 Teucrium, L. 



Garden esc. ; roadside. Introd. f . Eu. 



Marsh Speedwell. 



*Dr. E. L. Stuitevant. 



