REVUE BR GIQUE 
D IT. Pogonatum Brid. 
9. P. alpinum L.; Amer. and Eur., common in alp. 
regions. — , P. brevifolium Brid.; Eur., r. — 10. P. septen- 
trionale Swartz; Amer. and Eur., r. — 11. P. Macounn 
Kindb.; Amer., r. 
HIT. Polytrichadelphus Mitt. 
12. P. Lyallii (Mitt.) Kindb.; Amer., r. 
CES IV. Eu-Polytrichum C. M. 
43. P. sexangulare Br. Eur.; Amer. and Eur., r. — 14. P. 
juniperinum H.; Amer. and Eur., common. — , P. strictum 
anks; Amer. and Eur., notr. in alp. reg. — 15 P. pilife- 
rum Schreb., Amer. and Eur., common. — 16. P. boreale 
Kindb.; Amer.and Eur.,r.— 17.P.hyperboreum R.Br.; Amer. 
and Eur., r. — 18. P.gracile Menz.; Amer. and Eur.,notr.— 
49. P. formosum H.; Amer., r.; Eur., not r. — 20. P. Behrin- 
gianum Kindb.; Amer., r.— 21. P. ohioënse Ren. et Cardot; 
_Amer., not r.— 22. P. commune L.; Amer., not common, 
Eur., common. — , P. perigoniale Mich.; Amer . and Eur., 
not common. — 23. P. conorhynchum Kindb.; Amer., r. 
2. OLIGOTRICHUM Lam. et De C. : 
A. Leaves narrow, fainily erisped when dry, subvaginant, 
ally brown. 
_ a. Leaves with short lamellæ at the back. ur 
4. 0. mERCYNICUM Ehr. Catharinea Ehr. Oligotrichum Lam. 
et De GC. Bryum incurvum Huds. Oligotrichum Lindb. 
Leaves gradually narrowed, subulate or acute, dentate above 
atthe margins and at the back; lamellæ of the upper side 
cohering, 8-19, those of the under side 3-5 near the costa. 
. Capsule suboblong, not constricted below the mouth; pedicel 
not long ; calyptra often with many hairs. Mie R 
2. O. inreGriFocium Kindb., nov. sp. Oligotrichum hercy- 
micum var. latifolium CG. M. et Kindb., Cat. of Canad. Musci. 
= Differs from the last in the leaves broader, subobtuse, 
entire, smooth at the back ; capsule thicker at the base, cons- 
tricted below the mouth, plicate when dry. à ee 
b. Leaves with long lamellæ at the back. Pie ee 
A O. auGerum Miti. ; Sulliv., icon. muse. ; Lesq. et James, 
Leaves sublinear, subulate or acute, dentate at least above 
the middle at the margins, longer than in O. hercynicum ; 
_lamellæ of the upper side 5-8 near the costa, those of the 
under side 3-5 near the costa and 4-3 near the margins. Gap- 
sule narrowly ovate-oblong or subeylindric, constricted below 
the mouth; lid rostrate ; pedicel thin and very long; calyptra 
few hairs in the upper part. 
