114 MIDDLESEX FLORA. 



E. vaginatum, L. 



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



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



FlMBRISTYLIS, Vahl. 



F. autumnalis, Roem. & Schult. 

 Rather common. 



F. capillaris, Gray. 

 Common. 



RHYNCHOSPORA, Vahl. BEAK-RUSH. 



R. f usca, 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 (E. S. Hoar; specimen in herb. of). 

 S. reticularis, Michx. 

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



CAREX, L. SEDGE. 



C. folliculata, L. 



Common. 

 C. intumescens, Rudge. 



Frequent. 

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



Common. 



