30 ME. W. MITTEN — BBYOLOGIA OF THE STJEYEY 



Mnitjm, Linn. 

 M. insigne, Mitten. 

 Hab. Vancouver Island, Wood and Lyall ; British Columbia, Lyall. 



M. medium, B. et S. 



Hab. Pend Oreille and Pack Rivers, Fort Colville, and Cascade Moun- 

 tains, Lyall. 



M. affine, Bland. 



Hab. Saskatchewan and Rocky Mountains, Bourgeau. 



M. venustum, Mitten. 



Hab. Vancouver Island, Lyall. 



M. cuspidatum, Hedw. 

 Hab. Saskatchewan, Bourgeau. 



M. spinulosum, B. et S. 

 Hab. Fort Colville, Lyall. 



M. umbratile, sp. nov. Dioicum, foliis laxis patentibus, inferioribus 

 minoribus oblongis ovalibusque plus minus acutis integerrimis margi- 

 natis, superioribus elliptico-oblongis apiculo parvo terminatis, basi 

 longe decurrentibus, marginibus breviter duplicato-serratis, nervo per- 

 currente, cellulis omnibus rotundatis parietibus grossiuscuhs, perichge- 

 tialibus pluribus interioribus brevioribus lanceolatis, exterioribus elon- 

 gatis, caulinis angustioribus, theca in pedunculo pallide rubro hori- 

 zontali oblongo cylindracea basi attenuata curvata, operculo pallido 

 conico acuminato, cseterum M. serrato simillimum. 



Hab. " Mountain Rocks, Second point of Wood, Portage River," Drum- 

 mond ; Galton Mountains, British Columbia, Lyall. 



In appearance altogether like 31. serratum, Brid., and with fo- 

 liage, as in that species, contorted and shrinking away when dry, 

 but in its dioicous inflorescence allied to 31. orthorhynchum, Brid., 

 which was mixed with Drummond's specimens of his Bryum margi* 

 natum, no. 259; differing, however, from this in its -softer leaves 

 with cells four times as large, and also from 31. riparium, Mitten 

 {31. lycopodioides, Bryol. Europ.), which has its cells only half as 

 large, and the comal leaves long and narrow r . 



Timmia, Hedw. 



T. Megapolitana, Hedw. 



Hab. Vancouver Island and Galton Mountains, British Columbia, Lyall ; 

 Saskatchewan, Bourgeau. 



T. Austriaca, Hedw. 



Hab. Cascade Mountains and Pack River, British Columbia, Lyall. 



