42 
with the lid; spores large, smooth, .037-.059 mm. maturing in 
May and June to August and September. 
A variable species, growing on rocks in mountain streams,’ 
more or less local, but abundant. 
Original locality: Observatory Inlet, Scouler, 1829. Distrib- 
uted from the Columbia and Portage Rivers in Drummond's North 
American Mosses, No. 63. Also collected by Lyall in the Columbia 
River, by E. Hall in Oregon, Bolander in California, Leiberg in 
Traille River and Lake Pend d’Oreille, Idaho, and by Macoun in 
several localities in British Columbia and Vancouver Island. 
Ta. SCOULERIA AQUATICA NIGRESCENS Kindb. Bull. Torr. Club, 16: 
~ 94 (1889). 
Scouleria Nevii Miiller, Bull. Torr. Bot. Club, 17: 273 (1890). 
_ Plants coarse and rigid, in large dense black tufts ; stems 10- 
-15 cm. long, brittle, and clothed with the persistent veins of the 
leaves, branching above; leaves 2-3 mm., oblong lanceolate, blunt: 
and entire at the rounded apex, vein ending below it, often radicu- 
lose at base; margins serrate, basal cells rectangular next the vein, 
prosenchymatous near the margin, but extending upward only a 
short distance; some leaves simply hyaline at base with all cells 
rectangular. 
Original locality «On rocks in Nanaimo River, Vancouver 
Island. Also collected at Sicamous, B. C., in 1889, and Rogers 
Pass, Selkirk mountains, B. C., in 1890 and 1885. Distributed as 
No. 388 of Macoun’s Canadian mosses. 
These four specimens, presumably named by Kindberg, illus- 
trate the variation of the species, two being large, coarse plants, 
with larger leaves and the basal cells prosenchymatous, the other 
two small branching plants, with short leaves, and the basal cells 
scarcely prosenchymatous. 
2. SCOULERIA MARGINATA n. sp. Plate 227. 
_ Plants 3-4 cm. high, gregarious in dense black tufts; stems 
_Wiry and naked at base, branching and densely leafy above; 
leaves crowded, curled and twisted when dry, only the uppermost 
green, 2-3 mm. long, oblong lingulate, serrate above the middle, 
or obscurely serrulate near the base, teeth occasionally black and 
thickened ; apex blunt, entire or toothed, vein thick, ending below 
it, smooth on back; basal cells green rectangular, a narrow band, 
__ near the margin elongated, prosenchymatous, forming a dark dense 
__ border nearly to the apex of the leaf, saperposed by rounded small 
