(126) 



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 collum and about equalling it in 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 mem- 

 brane extending 4- up, segments broadly pointed with 8 to 10 

 narrow perforations, well developed cilia broad, solitary, 2 

 or 3 rows of cells wide, with apex sometimes slightly split or 

 shorter and imperfect. About three rows of transversely 

 elongated cells about mouth of capsule, the cells toward 

 middle becoming rectangular (3 or 4 to 1) and near base 

 short and irregular with oblong 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, I 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 in- 

 florescence (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 con- 

 nection. 



Bryum cusj>idatum Schimp. Dawson. This species has 

 the costa excurrent into a sharp, denticulate point 4 or 5 cells 

 in length, a revolute margin of narrow cells, dorsal plates of 

 exostome 2 or 3 times wider than high, 25 or more lamellae 

 on ventral surface and smooth spores up to .014 mm. (586). 



Bryum caes-piticium L. Marsh Lake. In good fruit June 

 10 (658). 



Bryum Duvalii Voit. Sterile specimens collected at the 

 head of Lake Bennett (652). 



Bryum ventricosum Dicks. (B. fiscudotriquctrum (Hedw.) 

 Schwaegr. ) Skagway. In line fruit August 27, on wet 

 rock (807). 



