MAcouN.] CATALOGTJE OP CANADIAN PLANTS. 187 



at Eevelstoke, and the mouth of Pass Creek, Columbia Eivei- ; on 

 rocks at Griffin Lake,- Sicamous, Yale, Agassiz and Hastings, B.C. ; 

 quite common on Vancouver Island at Victoria, Nanaimo and Comox. 

 {Macoun.) On rocks, Melaspina Inlet, B.C. (^Dawson.) North-west- 

 ern Alaska. (Roth. Alask.) Kodiak Island, Alaska, 1891. {J. M. 

 Macmm.~) 



(703.) T. laxifolium, (Hook.) 



Hypnum ( Cl,aopodium) laxifolium, Schwaegr ; Lesq. & James, Mosses of 

 N. America, 329. 



North-west coast of America. (Menzies.) North-western Alaska. 

 {Both. Alask.) 



117. TRIPTEROCLADiUM, (C. Mueller.) 



(704.) T. rupestre, Kindb. 



Platygyrium (?) rupeslre, Kindb. Bull. Torr. Bot. Club, XVII., 276 ; Cana- 

 dian Musci, No. 469. 



Plants intricate, ctespitose, pale brownish-green, not glossy. Stems 

 irregularly divided, branchlets short, filiform, not creeping. Leaves 

 small, densely crowded, when dry appressed, open-erect when moistened, 

 scarious and pellucid, not chlorophyllose nor papillose, subovate, acute 

 or long-acuminate, the upper denticulate above, the borders recurved 

 below, sometimes to the middle or above it ; areolation in the -lower 

 leaves sub-linear above, looser at the base, in the upper leaves looser, 

 oblong-linear, in all subquadrate at the borders and at the base ; costa 

 none. 



This species is probably monoecious, but the male flowers are not 

 distinctly evolute. Differs from the related Tripterocladium leucocla- 

 dulum, C. Muell. (not correctly described by Lesq. & James), of which 

 I possess original specimens, (given by the author, Dr. C. Mueller,) 

 in the leaves being revolute at the borders to the middle, nearly 

 entire or indistinctly denticulate, also in the narrower areolation 

 and the outer perichetial leaves being blunt, the inner erect, not 

 reflexed at the a,pex. (Kindberg.) 



On the face of a cliff above the first tunnel at Yale, B.C., May 17tl: 

 1889. (Macoun.) 



