MACOUN.] CATALOGrE Or CANADIAN PLANTS. 51 



when dry, suberect and nearly straight when moist, not undulate, from 

 a thin ovate-oblong base attenuate, nearly sublinear, acute or suddenly 

 pointed, very papillose ; margins involute, cucuUate above ; costa yel- 

 low pellucid, excurrent in an often denticulate point. Perichetial leaves 

 much broader and longer than the other, whitish, from a long lanceo- 

 late base subulate ; cells narrow, linear also above. Capsule narrow- 

 cylindric, nearly straight, suberect ; peristome long, several times 

 convolute. 



This species resembles rather the European Barhula inclinata 

 (Hedw. f.) than £. tortuosa, which has a larger capsule, longer leaves, 

 taller stems, &c. 



On earth and gravel on bars along old channels of the Illicillewaet, 

 near Eevelstoke, B.C.; fruiting abundantly, May 27th, 1890. (^Macoun.) 



(189.) B. fragilis, Bruch & Schimp. ; Lesq. & James, Mosses of N. 

 America, 129 ; Canadian Musci, No. ITS. 



Tortvla tortuosa, var. inclinata, Drumm. Muse. Bor.-Am., No. 142. 

 Didymodon fragile, (n. sp.), Drumm. Muse. Bor.-Am., No. 127. 



Dry mountain prairies ; upon the " Height of Land " in the Eocky 

 Mountains (142) ; margins of alpine lakes ; fruit very rare (127). 

 (Drummond.) Eiver du Loup (en bos) Que. {St. Oyr.) Eocks along 

 the bed of Ste. Anne des Monts Eiver, at the base of Mount Albert, 

 Gasp^ Co., Qae. ; abundant on the borders of marshy streams at Hector 

 and BaniF, Eocky Mountains ; fruit very scarce. (Macoun.) North 

 Shore of Lake Superior. (Agassiz.) Disco, Greenland. (Fl. Or.) 



(190.) B. C2espitosa, Schwaegr. ; Lesq. & James, Mosses of N. 

 America, 129. 



On earth at the base of trees in woods at Belleville, and near the 

 " Big Swamp '' Murray, and in Seymour West, Northumberland Co., 

 Ont. ; roots of trees, North Bay, Lake Nipissing. (Macoun.) 



(d.) EUBARBULA, C. Muell. 



(191.) B. Vahliana, Schultz ; Lesq. & James, Mosses of N. Ame- 

 rica, 117. 



On earth at Yale, B.C., May 17th, 1875. (Macom.) 



(192.) B. amplexa, Lesq. ; Lesq. & James, Mosses of N. Ame- 

 rica, 118. 

 Tortula humilis, Drumm. Muse. Bor.-Am., No. 137. 

 Limestone rocks of Lake Winnipeg. (Brummond.) 



