- Ub 
a. Leaves not linear. ; 
4. Cuspidatiformia. Leaves gradually larger upwards not — 
rosulate and not undulate, us. abruptly acuminate; teeth cilii- 
form; cells round-hexagonal us. not large. Lid of capsule sub- 
mamillate. Us. synoecious. 
5. Rosulata. Leaves. us. obtuse or with short point and 
gen. not undulate; teeth r. ciliiform; cells large sometimes suboval. 
‘Upper leaves of fruiting stem rosulate. Lid of capsule mamil- 
late-apiculate. Mostly dioecious. 
6. Rostrata. Leaves obtuse often undulate; teeth not cilii- 
‘form; cells small round-hexagonal. Upper leaves of fruiting 
stem rosulate. Lid of capsule long-rostrate. Dioecious. 
b. Leaves linear-lingulate. 
. A. Undulata. Leaves strongly undulate, the uppermost of 
fruiting stem rosulate; cells small round-hexagonal. Lid of 
capsule submamillate. Stems not tufted; shoots deflexed or 
the basal ascending. Dioecious. 
D. Leaves doubly. dentate (r. nearly entire), limbate by 
finally red cells. Outer perichetial leaves oblong-lanceolate. 
Stem r: with decumbent stolons.  Leaf-cells gen. not large. 
8. Spinosa. Upper leaves broad; costa excurrent: Capsules 
us. clustered; lid rostrate or rostellate. 
9. Serrata. Upper leaves narrow; costa us. percurrent. 
Capsule us. solitary; lid rostrate or apiculate. 
10. Horna. Leaves long narrow; costa not percurrent. 
Capsule solitary; lid mamillate. Tufts very tomentose. 
I Pseudo-Bryum Kindb. 
l.M.einelidioides M. N. Blytt. 
Leaves gen. suboval obtuse; costa not excurrent. Capsule 
suboval; teeth brown. Tufts loose high. — Swamps princ. in 
northern distr. Ewr. Norway! Sweden: M. Huss; Miss O. Cron. 
Belgium: Gravet. Amer. r. Can.: Macoun. 
IL. Eu-Mnium. 
1. Hymenophylloidea. 
2.M.hymenophylloides Huebener. : : 
Leaves circular or round-oval gen. obtuse, pale-limbate glau- 
cous or bright green; costa not percurrent. Stem not tornen- 
tose. — Alp. rocks r. Eur. Norway, Switzerl.! Amer. Can. 
Rocky mts: Macoun: 
2. Punctatiformia. - 
A. Leaves narrowly limbate by 1—2 pale cell-rows, short- 
'decurrent. Capsule broad-oval less large. Synoecious or dioecious. 
