MAoouN.] CATALOGUE OF CANADIAN PLANTS. 191 



very much longer than those in the middle open segments ; cilia 

 nodulose, not appendiculate, annulus none. Monoecious. Habit of 

 Leucodon jiilaceous. 



The species is (fide C.Mueller) allied to Brachythecium (Cavernularid) 

 biventrosum, CM., but more robust. It agrees also with B. Icetum, 

 (Brid.) not found in Europe ; it has long-acuminate, soft and shining, 

 and when dry, patent leaves. The European B. luteolum, C. M., (B. 

 Icetum, Schimp., non Brid.) is also different from the true B, Icetum, 

 which is neither completely nor correctly described by Lesq. & James, 

 principally in the dioecious inflorescence. 



On rocks in McKay's bush, Ottawa, Ont., October 12th, 1889. 

 {Macoun.) On rocks, Canaan Forks, Queen's Co., N.B., 1889. {J. Moser.') 



(716.) B. spurio-acuminatum, C. M.&Kindb. (n. sp.); Cana- 

 dian Musci, No. 566. 



Differs from Brachythecium acuminatum in the tufts being lax, loosely 

 adhering at the substrate, the leaves denticulate and recurved at the 

 borders nearly all around, the alar cells still more numerous and very 

 chlorophyllose, the perichetial leaves subulate-acuminate, not filiform- 

 pointed, the inflorescence monoecious. 



On logs in woods, Brighton, Northumberland Co., Ont., October 6th, 

 1888 ; also on logs at Leamington, Lake Erie, Ont.. 1890. {Macoun.) 



(717.) B. acuminatum, (Beauv.) 



Hypnum {Brachythecium) acuminatum, Beauv. ; Lesq. & James, Mosses of 



N. America, 336 ; Canadian Musci, No. 282. 

 H. pulchrum, Drumm. Muse Bor.-Am., No. 180, in part. , 

 H. erectum, Drumm. Muse. Bor.-Am., No. 224. 



Pictou Co., iSr.S. (McKay.) Bases of trees, Canaan Forks, Queen's 

 Co., N.B. (J. Moser.) On earth in McKay's woods, Ottawa; at 

 Carleton Place, 30 miles west of Ottawa ; on leaning trees at Wooler ; 

 on earth and logs in woods at Belleville, Ont. ; on the bases of trees, 

 Moose Mountain, Assiniboia. (Macoun.) In woods, London, Ont. (J. 

 Dearness.) Upon trunks of trees in Upper Canada (No. 180) (On- 

 tario) ; roots of trees in Upper Canada (No. 224.) (Drummond.) - 



* B. cyrtophyllum, Kindb. (n. subsp.) 



Brachythecium cyrtophyllum, Kindb. Ott. Nat. IV., 63. 



Habit of a small form of B. albicans. Plants caespitose, green and 

 faintly glossy. Stems irregularly divided, not creeping ; branchlets 

 filiform, sub-obtuse. Leaves small, close, loosely appressed when dry, 

 open-erect when moistened, ovate-acute or short-acuminate, notsulcate 



