( J 3o) 



Mnium serratum Schrad. Klondike River near mouth of 

 Bonanza Creek. In fine fruit, June 18. The leaves are 

 long-decurrent, median cells up to .025 mm. (663). 



Mnium orthorrhynchum Brid. Dawson. In good fruit, 

 July 16. Leaves somewhat decurrent, occasionally long- 

 decurrent. Median leaf-cells up to about .016 mm. (664). 



Mnium sftinulosum B. & S. Lake Lindeman (665). 



Mnium cinclidioidcs (Blytt.) Hueben. Dawson (666). 



Mnium Blyttii'B. & S. Dawson. The sterile specimens 

 referred here were growing in dense tufts up to 5 cm. high. 

 The lower stem leaves are very broad and obtuse with mostly 

 an entire border of one row of cells somewhat elongated and 

 often nearly disappearing toward apex. The upper leaves 

 are longer with a distinct border extending to a short pointed 

 apex and usually bearing a double row of short, blunt teeth. 

 Leaf-cells somewhat thickened, not pitted, scarcely elongated, 

 up to .020 mm. Costa smooth on the back, vanishing 5 or 

 6 cells below the leaf point. Leaves scarcely or not decur- 

 rent. M. Blyttii usually has rather long-decurrent leaves 

 (667). 



Milium punctatum datum B. & S. Lake Lindeman (668). 



Milium subglobosum B. & S. Lake Lindeman. This 

 species seems to constantly differ from the preceding in its 

 inflorescence and peristome. The teeth of the latter are only 

 about I as large as in punctatum, most of the dorsal plates 

 are nearly as high as wide and the lamellae are distant and 

 only 12 or 14 in number (669). 



Milium hymenophyllum B. & S. Bennett City and Daw- 

 son. Growing in large, thick tufts in damp and shady or wet 

 places. This species is very near M. hy men ophy lioides . It 

 was removed to Cinclidium by Lindberg, and Limpricht has 

 also placed it there. The only collection cited by the latter 

 is " Rabenhorst, Bryoth. Eur. No. 246," which is, at least in 

 the Columbia University set, not this plant but undoubtedly 

 hymenophylloides. The only true European specimens of 

 hymenophyllum examined are labeled " M. hymenophyllum. 

 Herjedalen. Un. itin. cr. 1867. Hellbom (41 et 42)." 



