| REVUE BRYOLOGIQUE 
12. P. cyan Mitt. Polytrichadelphus Mit. Oligotrichum 
Lindb., Sulliv., Icon. Musc.; Lesq. et James, Man. Polytri- 
chum Kindb. Mscr. 
Leaves patent or suberect when dry, more patent when 
moist, dentate in the upper part, often to the middle, short-: 
aristate; lamellæ about 30, their apical cell thick-walled, subo- 
val and smooth. Perichetial leaves with a smooth, lamellate, 
not long acumen. Capsule subovoïd-cylindric, constricted be- 
_ lowthe mouth, finally brown; pedicel yellowish. — Resem- 
bling P. alpinum and P. sexanqulare. 
IV. Eu-Polytrichum C. M., Syn. RER 
_ Capsule not papillose, with 4-6 angles and à distinct hypo- 
. physis; calyptra densely hairy, short-acuminate. Stem usually 
simple. Leaves rigid. 
À. Leaves short, obtusate and entire, not aristate. 
43. P. sexancuLarE Br. Eur.; Braith. L. c. P. septentrionale 
_C. M. Syn. À 
_B. Leaves aristate, nearly entire, not obtusate, genérally 
long; apical cell of the lameliæ 4 papillate. Capsule 4 angled, 
| prismatic. : Lt 
a. Leaves with a red awn, also the perichetial ones. 
14. P. s0NPERINUM Hedw. 
P: STRICTUM Banks. 
_ b. Leaves with a wholly or partly whitish awn, somewhat 
short-acuminate and not long, nearly appressed when dry. 
45. P. picirerum Schreb. P. pilosum Neck., Lindb. 
16. P. BoREALE Kindb., Laubm. Schwed. u. Norweg. re 
Leaves serrulate near the apex with a not long, partly red- 
dish awn; costa rough at the back. Capsule cubic. Perichetial 
_ leaves long-acuminate with along whitish awn. É 
17. P. HYPERBOREUM R. Brown. ci ue 
_ Leaves entire, broader than in the last and shorter-acumi- 
nate, only the upper ones with a parily whitish awn, the others 
red-arislate. Capsules not seen. Differs also from P. juniperi- 
num in the short leaves. a Sr 
_ C. Leaves red-pointed, generally denticulate above the . 
_sheath, long and long-subulate; lameilæ not papillate. Capsule 
usually 4 angled. Stem usually tomentose below. MORTE 
4. Capsule round-oval and not distineily angled when un- 
ripe. Leaves channelled ; wings of the lamina very much 
broader below. 
18. P. cRaciLe Menzies. Re ns us 
_ b. Capsule prismatie, angled also when unripe. Re 
Leaves usually plane; wings of the lamina not much broader 
Re FORMOSUM Hedw. P. aitenuatum Menz.; Lindb.; 
ie. * Ste Kris V4 HE : 4 LE VENE He. 
