280 GEOLOGICAL SURVEY OF CANADA. 



Var. compacta, Best. Bull. Torr. Bot. Club, Vol. XXVII., 



231. 



In intricate tufts or loose mats, dark green to blackish, branches 

 often with yellow-green tips ; stems 2-3 cm. long; branches short, 

 turgid; stem-leaves not rarely straight ; median leaf-cells oval- 

 rhombic to oblong-hexagonal. 



On rocks in a brook in Roger's Pass, August 2 1st, 1885 and 

 July 3ist, 1890; also on rock three miles beiow Hector, Rocky 

 Mountains, B.C., August I3th, 1890. (Macoun.) 



1128. P. substriata, BEST.; Bull. Torr. Bot. Club., Vol. XXVII., 



P- 233. 



In appressed.subshining tufts, yellowish green to golden-brown; 

 stems prostrate, radiculose 2-4 cm. long, pinnately branched ; 

 branches suberect, simple, scarcely curved; paraphyllia few, multi- 

 form; stem leaves erect-spreading, straight, deeply biplicate, oval- 

 oblong, gradually acute or acuminate (acumen shorter than body), 

 "8-1 mm. long, -3-4 mm. wide; margins strongly recurved to nearly 

 apex, serrate above ; costa toothed, subpercurrent ; stem-leaves 

 smooth, clear ; basal, oblong-linear in 2 or 3 rows; alar quadrate, 

 rugose, thick-walled, filling the space between folds and margins, 

 extending upwards and becoming oblong ; apical linear; median 

 sublinear .006 mm. wide, 4-6 times as long. 



Type specimens collected on rocks three miles below Hector, 

 on the Canadian Pacific Railway, B.C., Aug. I3th, 1890. It was 

 originally numbered 484 and named / . atrovirens by Dr. Kind- 

 berg. 



On rock along the shore of Lake Lind^man, Yukon. (Williams.} 



We have followed Dr. Best in the arrangement of our speci- 

 mens of this genus as we believe he has done good and careful 

 work. 



1129. P. pallida, BEST. var. filescens, BEST. 

 Head of Lake Bennett, Yukon. (Williams^ 



115. HETEROCLADIUM, Bruch & Schimp. 



687. H. dimorphuin, BR. EUR. 



H. squarrosulum (Voit.) ; Kindb. Bryol. N. Am. & Eur., 46 ; 



Best, Bull. Torr. Bot. Club, Vol. XXVIII., p. 127. 

 On rocks at Hector, Rocky Mountain , B.C., Aug. I5th, 1890. 

 Referred to Pseudoleskea atrovirens in Part VI. (Macoun.} 



