— 71 — 



a length of 3 or 4 cells and a brown revolute border of thick-walled cells in 

 ■double layer, confluent with the costa. Lower stem leaves much smaller 

 with costa vanishing. Inner perichaetial leaves very broad, the width very 

 often equal to yi, or more, of the length and costa percurrent. Median leaf- 

 cells mostly hexagonal, 2 to 4 times longer than wide, up to .070 mm. long. 

 Cell walls rather thick, scarcely pitted or sometimes distinctly so both above 

 and below. Capsule with lid up to 5.5 mm. long. Sporangium not con- 

 tracted below mouth, mostly somewhat gradually narrowed to coUum and 

 about equalling it m length. Lid low-convex, not mamillate. Annulus of 3 

 or 4 rows of cells. Exostome pale golden-yellow below with dorsal plates 

 near base 3 to 4 times wider than high and 26 to 28 lamellae on ventral side 

 not joined by cross walls. Endostome free, with basal membrane extend- 

 ing % up, segments broadly pointed with 8 to 10 narrow perforations, well 

 developed celia broad, solitary, 2 or 3 rows of cells wide, with apex some- 

 times slightly split or shorter and imperfect. About three rows of trans- 

 versely elongated cells about mouth of capsule, the cells toward middle 

 becoming rectangular (3 or 4 to i) and near base short and irregular with ob- 

 long stomata about ,040 mm. long. Spores smooth, up to .024 mm. (Plate 18.) 



On rocky hillside between Canon City and Sheep Camp, on Dyea Creek, 

 March 28, 1898. This plant comes nearest uliginosum, 1 believe, but differs 

 in the more pointed leaf with more distinct and revolute border, pitted leaf- 

 .cells, blunt lid, more developed inner peristome and dioicous inflorescence (578). 



This plant was wholly unnamed by M. Philibert, and I should have been 

 •greatly pleased to have given his name to the species, but it does not seem 

 to be available in this connection. 

 Br yum subinuticujn Philibert, sp. nov. 



Dioicous. Male flowers bud-like with leaves ovate and more or less 

 ■spreading but not reflexed near middle, abruptly much smaller on stem be- 

 low Plants growing in extensive mats 2 or 3 cm. thick, stems scarcely 

 iDranched, felted together with a dense mass of radicles below. Outer peri- 

 •chaetial leaves 2^ mm. long, ovate, somewhat acutely pointed with costa 

 percurrent or excurrent the length of i or 2 short cells, upper stem leaves a 

 little shortei: and costa vanishing just below apex, all entire or nearly so with 

 a distinct revolute border of about 3 rows of long narrow cells near middle, 

 towards apex the margins flat and cells not much elongated. Inner peri- 

 chaetial leaves ovate-lanceolate with costa vanishing just below apex. 

 Median leaf-cells about. 035 mm. long and ^ as broad, lower cells short rect- 

 angular (about i-^Yz or 2). Cell walls all somewhat thickened but not 

 pitted. Capsule with lid up to 2% mm. long, slightly narrowed under the 

 mouth, the sporangium gradually narrowed to a shorter collum. Exostome 

 pale yellow below. Plates of teeth narrow (about 1-3) near base, lamella 

 from 25-30. Basal membrane of endostome extending >^ up, the segments 

 broadly perforated and separated by mostly 3 appendiculate cilia. Two or 

 3 rows of transversely elongated cells about mouth of capsule, the cells near 

 middle broad, often scarcely elongated with somewhat sinuous walls, at base 

 very irregular and sinuous walled. Oblong stomata about .035 mm. long. 

 Smooth spores up to .014 mm. Annulus of 4 rows of cells. (Plate 19). 



