= WB 
Perichetial leaves entire somewhat long-acuminate, lamellate — 
above; awn rough and red. Capsule rectangular-prismatic; pe- 
dicel often very long. Stem not much naked and gen. not 
tomentose, sometimes branched. — Heaths and woods common 
but less often in alps. Eur. Sweden, Norway, Switzerl! Amer. 
Can.: J. Macoun. Alaska: J. M. Macoun. A 
18.P.strietum Banks. 
Differs from the last: Leaves shorter with shorter acumen, | 
. us. appressed when dry; lamelle about 30. Capsule cubic; 
pedicel less long. Stem tomentose us. simple. — Swamps - 
princ. in alps not common. Eur. Norway! Amer. Can.: Macoun; — 
Waghorne. Greenl.: Vanhoeffen. 
19.P.hyperboreum R. Brown. 
Leaves short short-acuminate entire, straight and not much 
patent when moist, appressed when dry; lamellæ about 30; 
costa emooth; awn short faintly rough, often (at least in upper | 
leaves) partly whitish, in some leaves wholly red.  Perichetial | 
leaves entire somewhat long-acuminate; awn whitish above, 
nearly smooth. Stem of female plants branched often tomen- 
tose. Capsule cubic; pedicel not long. Male plant with shorter 
broader leaves, disposed in distant fascicles. Habit of the last. 
— Dry and wet places in northern alps. Eur. Norway! Fink: — 
Brotherus. Amer. Greenl: Berggren; Vanhoeffen. Can. N. La- — 
brador: Macoun 1896. i 
20.P.boreale Kindb. Laubm. Schwed. u. Norw. 
Differs from the last: Leaves gen. dentate near apex below 
the awn, with longer acumen; costa rough at back; awn longer 
always whitish above. Perichetial leaves more distinctly den- 
ticulate; awn rough nearly wholly whitish. Stem not tomentose. : 
— Dry places in northern alps r. Eur. Norway in Dovrefjeld! . 
Amer, Greenl: Berggren; Vanhoeffen. Alaska: J. M. Macoun. 2 
Can. Labrador: Waghorne. dea 
21.P.piliferum Schreber. ES 
Leaves short entire short-acuminate or subobtusate, appressed 
when dry; Jamelle about 30; costa smooth; awn long wholly . 
whitish nearly smooth. | Perichetial leaves not lamellate. Cap- — 
sule short-prismatie or cubic, inclined or suberect, Stem shot — 
simple, naked at least in lower half; the foliated part subcla- 
vate. — Dry heaths also in alp. regions common. Eur. Swe- 
den, Norway! Amer. Can.: Macoun. 
b. Leaves denticulate not convolute, long and long-subulate, 
