18 ME. W. MITTEN — BRTOLOGIA OF THE SURVEY 



D. fuscescens, Turner. 



Hab. Cascade Mountains and Galton Mountains, Lyall; Winnipeg, 

 Bourgeau. 



D. PALLIDUM, B. et S. 



Hab. British Columbia, Lyall. Gathered also in N.W. America by 

 Douglas and Seemann. It appears to be generally distributed in 

 N. America. 



D. scoparium {Linn.). 



Hab. British Columbia, Lyall; N.W.America, Seemann ; Columbia, 

 Douglas. It occurs as far north as Baffin's Bay, but according to 

 Sullivant is less common than the preceding in the United States. 



D. pa lustre, La Pyl. 



Hab. Pend Oreille River and Semihamoo Bay, Lyall ; Vancouver Island, 

 Wood ; Lake Winnipeg, Bourgeau. Generally distributed. 



D. undulatum, Turner. D. polysetum, Sw. 

 Hab. Saskatchewan, Bourgeau. 



D. Drummondii, C. Muller. 



Hab. Saskatchewan and Portage de la Prairie, Lake Winnipeg, Bour- 

 geau. 



D. SCHRADERI, Schw. 



Hab. Saskatchewan, Bourgeau. 



D. longifolium, Hedw. 



Hab. Portage de la Prele, Lake Winnipeg, Bourgeau. 



D. enerve, Thed. (D. albicans, B. et S.), was gathered by Douglas 

 in "N.W. America. 



HOLOMITRITJM, BHd. 



H. cirrhatum, (Weissia) Hedw. 



Hab. Vancouver Island and British Columbia, Lyall. Collected 

 Douglas in N.W. America. 



H. crispulum, (Weissia) Hedw. 



Hab. Galton Mountains and near Fort Colville, Lyall. 



Didtmodon, Hedw. 



(Amphoridium, Schimp.) 



D. Lapponicus, (Gymnostomum) Hedw. 

 Hab. Cascade Mountains, Lyall. 



D. cespitosus, sp. nov. D. Mougeotii habitu staturaque simillimus, 

 foliis e basi erecta patentibus apice incurvo erectis sensim acutis re- 

 mote serrulatis, cellulis basi oblongis rectangulatis, deinde in ovoideas 

 et superne in rotundatas transeuntibus. 



Hab. Vancouver Island, Lyall. 



