MIDDLESEX FLOKA. 141 



D. scoparium, Hedw., var. pallidum, Lesq. & James. 



Waltham (Mrs. S. E. French). 

 D. spurium, Hedw. 



Newton (C. E. Faxon). 

 D. Drummondii, Muell. 



Woburn (Edwin Faxon). 

 D. undulatum, Turn. 



Chelmsford (Rev. J. L. Russell) ; Waltham (Mrs. S. E. French) ; 



Woburn (Edwin Faxon) . 



FISSIDENS, Hedw. 



F. exiguus, Sulliv. 



Waltham (Mrs. S. E. French). 

 F. osmundioides, Hedw. 



Melrose (H. A. Young.) 

 F. adianto.ides, Hedw. 



Chelmsford (Rev. J. L. Russell) ; Melrose (H. A. Young) ; Waltham 



(Mrs. S. E. French). 

 F. adiantoides, Hedw., var immarginatus, Lindb. 



Natick (Miss C. E. Cummings). 



LEUCOBRYUM, Hampe. 



L. vulgare, Hampe. 



Common. 

 L. minus, Sulliv. 



Waltham (Mrs. S. E. French). 



CERATODON, Brid. 



C. purpureus, Brid. 

 Common. 



POTTIA, Ehrh. 



P. cavifolia, Ehrh. ? 



Chelmsford (Rev. J. L. Russell), under the name of Gymnostomum 

 ovatum, Hedw. There may be a mistake here, as the localities 

 given for this species in Lesq. & James Man. are from the Rocky 

 Mountains westward. 



P. truncata, Fuern. 



Chelmsford (Rev. J. L. Russell), as Gymnostomum truncatulum, 

 Hampe; also found at the Botanic Garden, Cambridge, perhaps 

 introduced (A. B. Seymour). 



LEPTOTRICHUM, Hampe. 

 L. tortile, Muell. 

 Common. 



