— 127 — 
faintly mamillose above; upper cells narrow, the lower dilated, 
the alar yellow; costa vanishing in acumen. Capsule large sub- 
cylindric arcuate; lid rostellate-apiculate; pedicel very long. 
Perichetial leaves plicate. Tufts loose. Stem pinnate very 
tomentose; branches distant; paraphyllia numerous. — Wet cal- 
careous places. Eur. common below alp. regions. Sweden, 
Norway, France, Switzerll Amer. r. »U. S.»: Lesq. et. Jam. 
 *H.suleatum Schimper. 
Stem less regularly pinnate; branches less distant. Leaves 
smaller, short-decurrent; their costa shorter. Capsule smaller. 
— Alpine, often not calcareous, stations. Hur. somewhat r. 
Norway, Switzerl.! Amer. r. »Greenl.»: Berggren. ` N. Foundl.: 
aghorne. 
2.H.decipiens Notaris. — Thuidium Not; Hypnum Kindb. 
Differs from H. commutatum: Leaves gen. mamillose on both 
sides, with broader base and shorter acumen, less striate; alar 
cells gen. -hyaline; cells shorter, those of branch-leaves oval- 
oblong; costa shorter, faint above.  Perichetial leaves shorter, 
: faintly striate. Stem often sparingly tomentose; branches often 
simple above. Very r. fruiting. — Rivulets, princ. in alps, 
also in not calcareous districts, gen. r. Eur. Sweden, Norway, 
Switzerl.! Amer. Can.: Macoun; Waghorne. 
B. Leaves crowded, not decurrent, nearly entire; alar cells 
not large. 
?-H.faleatum Bridel. : 
. Leaves from ovate-oblong base long-acuminate, often striate, 
indistinctly mamillose, cells sublinear; costa us. vanishing in 
acumen. Perichetial leaves plicate. Capsule less large than in 
H. commutatum; lid with shorter point. Tufts brown or dark 
green, often dense. Stem us. irregularly pinnate and sparingly 
tomentose; branches approached. — Swamps and rivulets princ. 
Mm not calcareous alp. stations. Hur. common in alps. Sweden, . 
Norway, France, Switzerland! Amer. Can. not r.: Macoun. 
lLirrigatum Zetterstedt. — H. virescens Boulay. 
Leaves ovate-lanceolate faintly striate; alar cells us. not well- 
defined; costa of stem-leaves gen. percurrent. Tufts dirty greeen. 
m often pinnate, sometimes naked below; paraphyllia few. 
Very r. fruiting. — Rivulets r. Eur. Sweden, Norway, Switzerl.! 
a IL. Cratoneuron Sullivant, in part. 
. MHfilieinum L. — Amblystegium Notaris. 
| ves minutely denticulate all around; alar cells large us. 
hyaline; eosta not thin in the acumen, sometimes excurrent. 
