— 343 — 
16.M.aretieum Kindb. in Biblioth. botan. 42 (1897). 
Lower leaves decurrent with long ciliiform teeth, oblong 
obtuse; the uppermost oblong-lanceolate short:acuminate acute; 
outer perichetial ovate-lanceolate long-acuminate acute. Cap- 
sule solitary small (as in M. cuspidatum) suboval; pedicel not 
long. Tufts loose, about 2 c. m. high. Shoots erect:  Dioe- 
cious. Habit of M. cuspidatum. — Arctic district r. Amer. 
Greenl. Karajak-Nunatak: Vanhoeffen. 
6. Rostrata. 
17.M.rostratum Schrader. 
Leaves not or slightly decurrent: lower small rotundate or 
broad-oval; upper oval or broadly obovate obtuse, entire below. 
Capsules yellowish often clustered. Tufts loose. — Rocks 
and stonewalls. Eur. not r. in lower distr. Sweden, Switzerl.! 
Amer. Can. not uncommon: Macoun. 
7. Undulata. 
18.M.undulatum Weis. 
Leaves decurrent obtuse dentate all around. Capsules often 
clustered. — Wet woods in lower distr. Eur. nearly common. 
 Sweden!; J. Persson. Denmark: M. F. Lange. Greece: Heldreich. 
8. Spinosa. 
19.M.spinosum Voit. — Bryum Voit; Mnium Schwegrichen. 
Leaves curled when dry: upper subobovate; inner perichetial 
us. doubly dentate limbate. Tufts dark green loosely cohering. 
Dioecious. — Earth and rocks in woods, sometimes in alps. 
Eur. not uncommon. Norway, Switzerl.! Amer. r. »U. 5.9: 
Lesq. et Jam. 
20.M.spinulosum Bryol. eur. : ] 
Leaves not or slightly curled: upper subobovate; inner peri- 
chetial us. simply dentate and not limbate. Tufts bright green 
densely cohering. Synoecious. — Base of trees. Eur. r. Austria: 
Schimper. France: Husnot. Germany: Progel Amer, not r. 
Can.: Macoun; Dawson. LOS 
* M.macrociliare C. M. et Kindb. l. e. — od 
Leaves dark-green ‘smaller; teeth more ciliiform, sometimes 
simple. Capsule solitary. — Amer. r. Can.: Macoun. 
EC 9. ferrata. 
. Å, -Synoecious or paroecious without special male plants. 
. Stem us. radiculose between lower leaves. ~i EOS 
21.M.marginatum Dickson. — Bryum Dicks. 1790; Mnium 
Beauvois; M. serratum Schrader ? (1791); Br. eur. 
Leaves long-decurrent; costa scarcely percurrent. Upper 
