MIDDLESEX FLORA. 113 



SCIRPUS, L. BULRUSH. CLUB-RUSH. 



S. planifolius, Muhl. 



Maiden and Melrose (H. A. Young) ; Medford (C. E. Perkins) ; 



Concord (E. S. Hoar) ; Wakefleld (F. S. Collins). Not common. 

 S. subterminalis, Torr. 



Generally distributed. 

 S. pungens, Vahl. 



Common. 

 S. Torreyi, Olney. 



Groton (C. W. Jenks) ; Westford (Dr. C. W. Swan) ; Spot Pond, 



Stoneham, and Sandy Pond, Littleton (Win. Boott) ; Concord 



(C. E. Perkins). 

 S. lacustris, L. (S. validus, Vahl., Man.) GREAT BULRUSH. 



Generally distributed. 

 S. debilis, Pursh. 



Tewksbury and Lowell (Dr. C. W. Swan) ; Winchester and Med- 

 ford (C. E. Perkins) ; Newton (C. J. Sprague) ; Concord (E. S. 



Hoar). 

 S. supinus,L., var. Hallii, Gray. 



Winter Pond, Winchester (E. H. Hitchings, 1878 ; C. W. Jenks and 



Dr. C. W. Swan, 1884). 

 S. maritimus, L. SEA CLUB-RUSH. 



Common near brackish water. 

 S. sylvaticus, L. 



Winchester (C. E. Perkins) ; Medford and Woburn (Wm. Boott) ; 



Concord (E. S. Hoar). 

 S. Sylvaticus, L., var. digynus, Boeckl. (S. microcarpus, 



Presl, Man.) 



Lowell (Dr. C. W. Swan) ; Medford and Woburn (Wm. Boott) ; 



Maiden (F. S. Collins). 

 S. atrovirens, Muhl. 



Ashby, Lowell and Dracut (Dr. C. W. Swan) ; Belmont (C. E. 



Perkins) ; Bedford (C. W. Jenks) ; Maiden and Medford (F. S. 



Collins). Occasional. 

 S. Eriophorum, Michx. WOOL-GRASS. 



Common, and generally distributed; including the forms var. 



cyperinus, Gray; Lowell, Acton and Hopkinton (Dr. C. W. 



Swan) ; and var. laxus, Gray; Lowell and Chelmsford (Dr. C. W. 



Swan) . 



ERIOPHORUM, L. COTTON GRASS. 

 E. alpinum, L. 



Groton (C. W. Jenks) ; Woburn and Arlington (Wm. Boott) ; Ash- 

 land (Rev. Thos. Morong). 



