MIDDLESEX FLORA. 117 



C. arctata, Boott. 



Ashby (Dr. C. W. Swan) ; Medford (C. E. Perkins) ; Maiden (Wm. 



Boott). 

 C. debilis, Michx. 



Common. 

 C. gracillima, Schw. 



Lowell, Acton, Cambridge, Newton, et al. Not uncommon. 

 C. f lava, L. 



Common. 

 C. CEderi, Retz. 



Maiden (H. A. Young) ; Medford (Wm. Boott). 

 C.fulva, Good. 



Tewksbury (B. D. Greene, specimen in herb. B. S. N. H.) Not 



since reported, and probably adventive. 

 *C. Icevigata, Smith. 



Tewksbury (B. D. Greene). Not since reported, and probably 



adventive. 

 C. pallescens, L. 



Common; including the form with wavy sheaths known as var. 



undulata, Carey, Concord (E. S. Hoar). 

 C. conoidea, Schk. 



Rather common. 

 C, laxiflora, Lam., var. patulifolia, Carey, (var. plantaginea, 



Boott, Man.) 



Maiden and Hopkinton (F. S. Collins) ; Medford (Wm. Boott). 



C. laxiflora, L., var. intermedia, Boott. 

 Melrose (Rev. Thos. Morong) ; Maiden and Medford (Wm. Boott) ; 

 Woburn (C. E. Perkins) ; Wakefield (F. S. Collins). 



C. laxiflora, Lam., var. striatula, Carey, (var. blanda, Boott, 

 Man.) 



Cambridge (L. H. Bailey, Jr.); Melrose (Rev. Thos. Morong); 

 Winchester ("Wm. Boott) ; Maiden and Wakefield (F. S. Collins). 

 An abnormal form with enlarged and inflated pergynia, Wakefield, 

 June 19, 1887 (F. S. Collins). 



C. laxiflora, Lam., var. latifolia, Boott. 



Acton (Walter Deane; specimen in herb, of); Maiden (Wm. 

 Boott). 



It is doubtful if we have the type, which is thus characterized; 

 u Perigynium elliptic, attenuated at the apex, not prominently 

 nerved; beak not strongly curved; leaves 3 lines or less broad; 

 pistillate spikes an inch or more long, narrow, loosely flowered, 

 cylindrical ; staminate spike long peduncled." Bailey, Prel. Syn- 

 opsis N. A. Carices. 



