114 MIDDLESEX FLOEA. 



E. vaginatum, L. 



Maiden (R. Frohock) ; Melrose (H. A. Young) ; Concord (E. S. 



Hoar) ; Natlck (Rev. Thos. Morong). 

 E. Virginicum, L. 



Common. 

 E. polystachyon, L. 



Common. 



E. gracile, Koch. 



Reading and Medford (C. E. Perkins) ; Bedford (Dr. C. W. Swan) ; 

 Concord (E. S. Hoar) ; Natick (Eev. Thos. Morong). 



FlMBEISTYLIS, Vahl. 



F. autumnalis, Roem. & Schult. 

 Rather common. 



F. capillaris. Gray. 

 Common. 



Rhtnchospoea, Vahl. Beak-Rush. 



R. fusca, Roem. & Schult. 



Groton and Westford (Dr. C. W. Swan) ; Cambridge (Wm. Boott) ; 



Bedford (C. W. Jenks) ; Concord (E. S. Hoar). Not common. 

 R. alba, Vahl. 



Frequent. 

 R. glomerata, Vahl. 



Common. 



Cladium, p. Browne. Twig-Rush. 



C. mariscoides, Torr. 

 Groton, Westford, Winchester, Ashland, et al. Not very common. 



SCLERiA, L. Nut-Rush. 



S. triglomerata, Michx. 



Concord (B. S. Hoar; specimen in herb. of). 

 S. reticularis, Michx. 



Winter Pond, Winchester (Wm. Boott, C. E. Perkins, et al.) 



Carex, L. Sedge. 



C. fol lieu lata, L. 



Common. 

 C. intumescens, Rudge. 



Frequent. 

 C. lurida, Wahl. (C. lupulina, Muhl., Man.) 



Common. 



