— 40 — 



branch-leaves ovate-oblong or ovate-lanceolate often long-acu- 

 minate. Capsule suboval; lid conic mamillate. Stem red; pa- 

 raphyllia numerous. R. fruiting. — Earth and rocks princ. in 

 alps gen. r. Eur. Norwa}', Switzerl.! Sweden: Hartman. Amer. 

 Can.: Macoun; Waghorne. 



B. Leaves denticulate or serrate all around. Branches not 

 turgid. 



a. Leaves green; costa double. 



2.Il.brevirOStre Ehrhart. — Hypnum Ehrh.; Hylocomium 

 Br. eur. 



Stem with numerous paraphyllia. Leaves diversiform; an- 

 gular cells small suboblong hyaline, the lower (special alar) 

 brown somewhat large. Stem-leaves from very broad-cordate 

 base abruptly tapering to a narrowly subulate acumen, brown 

 at insertion, minutely denticulate. Branch-leaves serrate ovate- 

 oblong gen. gradually acuminate. Perichetial leaves pale green 

 abruptly narrowed to the dentate us. subulate, patent or de- 

 flexed acumen, often serrate below it. Capsule oval-oblong 

 curved; lid us. rostellate. — Earth, stone and trees. Eur. not 

 r. Sweden, Germany, SwitzerLl Amer. r. Can.: Macoun; Moser. 

 U. S.: A. G. Wetherby. 

 S.H.calvescens Wilson. — Pleurozium Kindb. rev. bryol. 1895. 



Stem with few paraphyllia. Leaves uniform subdistant den- 

 ticulate from cordate broad-ovate base gradually long-acuminate; 

 angular cells large hyaline, only the lowest brown. Perichetial 

 leaves hyaline nearly gradually narrowed to the serrate falcate 

 filiform-pointed acumen. Capsule suboval curved; lid mamillate 

 or subacute. Very r. fruiting. Resembles the last and Hyp- 

 num squarrosum, from which it differs in leaves not falcate 

 when moist, shorter pedicel of capsule etc. — Earth in woods 

 r. Eur. Sweden: Hj. Holmgren, com. M. Huss; Arnell; E. Ny- 

 man; P. Dusen. Norway: Zetterstedt. Finl.: V. F. Brotherus. 



b. Leaves serrate sometimes brown-green; costa simple. Pa- 

 raphyllia few. 



4.H.striatum Schreber. — Hypnum Schreb.; Hylocomium 

 Kindb. Laubm. Schw. u. Norw.; Eurhynchium Br. eur. 



Leaves subdistant green very plicate when dry; alar cells 

 few large subrectangular hyaline; costa vanishing in acumen. 

 Stem-leaves broad-o^'ate obtusate; branch-leaves acuminate nar- 

 rower; perichetial hyaline with dilated cells, denticulate above 

 middle of basal part. Capsule large arcuate finally blackish; 

 lid rostrate. Stem not decumbent; branches distant often attenuate. 



