MIDDLESEX FLORA. 115 



C. lurida, Wahl., var. polystachya, Bailey. 

 A form with loug peduncles (2>2 iu.) and oblong-cylindrical spikes 

 (234 X ?8 iu-)' Chelmsford (Dr. C. W. Swan). Prof. Bailey states 

 that he has never before seen this variety from so far east. 



C. oligosperma, Michx. 



Concord, abundant in cold bogs near the river (Walter Deane) ; 



Tewksbury (Wm. Boott) ; Bedford (Dr. C. W. Swan). 

 C. rostrata, With., var. utriculata, Bailey, (C. utriculata, Boott, 



Man.) 



Common. 

 C. monile, Tuck. 



Generally distributed, but not very common. In a singular form 



found near the Concord river at Bedford (Dr. C. W. Swan), the 



culm itself forms by continuation the axis of the upper fertile 



spike, which, in the specimens at hand, is surmounted, or not, by 



a solitai-y and sessile staminate spike. 

 C. Tuckermani, Boott. 



Concord (E. S. Hoar, and specimen in Thoreau Herb.) 

 C. bullata, Schk. 



Rather common. 

 C. tentaculata, Muhl. 



Very common. 

 C. Pseudo-Cyperus, L. 



Lowell (Dr. C. W. Swan). 

 C. Pseudo-Cyperus, L., var. comosa, Wm. Boott, (C. comosa, 



Boott, Man.) 



Rather common. 

 C. scabrata, Schw. 



Ashby (Dr. C. W. Swan) ; Maiden (C. E. Perkins) ; Concord, 



abundant (Walter Deane) ; Arlington (Wm. Boott). 

 C. vestita, Willd. 



Frequent. A leafy form with usually three fertile spikes, and 



lowest bract much exceeding the culm, occurs at Lowell (Dr. C. 



W. Swan). 

 C. filiformis, L. 



Common. 

 C. filiformis, L., var. latlfolia, Boeckl. (C. lanuginosa, Michx., 



Man.) 



Common. 

 C. HIKTA, L. 



Cambridge (L. H. Bailey, Jr.) ; Melrose (C. E. Perkins) ; Medford 

 (Wm. Boott) ; Ashland (Rev. Thos. Morong). Nat. from Eu. 



