280 GEOLOGICAL SURVEY OF CANADA. 



Van compacta, Best. Bull. Terr. 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 21st, 1885 and 

 July 31st, 1890; also on rock three miles below Hector, Rocky 

 Mountains, B.C., August 13th, 1890. (Macowi.) 



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. 13th, 1890. It was 

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

 berg. 



On rock along the shore of Lake Lindt-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. fllescens, Best. 

 Head of Lake Bennett, Yukon. {Williams.) 



115. HETEROCLADIUM, Bruch & Schimp. 



687. H. dimorphum, 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. 15th, 1890. 

 Referred to Pseudoleskea atrovirens in Part VI. {Macoun.) 



