(130 ) 
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 .o16 mm. (664). 
Mnium spinulosum B. & S. Lake Lindeman (665). 
Mnium cinclidiordes (Blytt.) Hueben. Dawson (666). 
Mnium Blyttiit 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 .o20 mm. Costa smooth on the back, vanishing 5 or 
6 cells below the leaf point. Leaves scarcely or not decur- 
rent. JZ. Blyttiz usually has rather long-decurrent leaves 
(667). 
Mnium punctatum elatum B. & S. Lake Lindeman (668). 
Mnium 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 # 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). 
Mnium 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 JZ. hymenophylloides. It 
was removed to Cznclidium 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 ‘‘ 7. hymenophyllum. 
Herjedalen. Un. itin. cr.) 1867. Eelibom) (41set 42)."’ 
