— 339 — 



&. 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. Bosulata. 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. Bostrata. 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. 



7. Undnlata. 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. nearl}' entire), limbate by 

 finally red cells. Outer periohetial 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 maraillate. Tufts very tomentose. 



I. Pseudo-Bryum Kindb. 

 LM.cinclidioides M. N. Blytt. 



Leaves gen. suboval obtuse; costa not excurrent. Capsule 

 suboval; teeth brown. Tufts loose high. — Swamps princ. in 

 northern distr. Eur. Norwayl Sweden: M. Huss; Miss 0. Cron. 

 Belgium: Gravet. Amer. r. Can.: Macoun. 

 IL Eu-Mnium. 

 1. Hymenophylloidea. 

 2.M.hymenophylloide8 Huebener. 



Leaves circular or round-oval gen. obtuse, pale-limbate glau- 

 cous or bright green; costa not percurrent. Stem not tomen- 

 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. 



