— U& — 



high. — Wet alp. rocks r. Amer. Can.: Brit. Col.: Macoun. 

 U. S.: Roell. 



bb. Upper leaves nearly crowded and not or shortly decur- 

 rent. Leaves gradually larger upwards. Tufts often low. 

 27.M.orthorhyuchum Bridel. 



Lower leaves suboval, upper suboblong gen. acute; costa not 

 excurrent, us. dentate at back. Capsule straight suboval; teeth 

 pale; lid rostellate. Tufts us. dense. Rocks princ. in alps. 

 — Eur. not r. Norway, Switzerl.l France: Husnot. Amer. Can.: 

 Macoun. 

 28.M.iiicIinatum Lindberg. 



Differs from the last princ. in shorter and smaller leaves; 

 the lower rotundate or broad-ovate, the upper suboval subob- 

 tuse. Capsule curved suboblong; teeth yellow; lid apiculate. 

 Tufts often loose. R. fruiting. — Alp. rocks r. Eur. Norway, 

 Switzerl.l Amer. Can.: Drummond; Macoun. Greenl.: Vanhoeffen. 

 29.M.psendo-Iycopodioides C. M. et Kindb. 1. c. — M. lyco- 

 podioides Lesq. et Jam. 



Leaves as in M. orthorhynchum but gen. obtuse and more 

 curled; costa not dentate, often excurrent. Capsule curved with 

 distinct neck; teeth pale; lid rostellate. Tufts loose not high. 

 T— Base of trees in swamps r. Amer. Can.: Macoun. 



10. Horna. 

 SO.M.hornum L. 



Leaves sublinear-lanceolate or oblong-lanceolate, not or scar- 

 cely decurrent. Capsule oblong or suboval; teeth pale. Tufts 

 often high. Dioecious. — Rocks and woods. Eur. gen. com- 

 mon. Sweden, Norwayl Amer. Can.: Macoun. 



153. Roellia Kindb. revue bryol. 1896. 

 l.B.lucida Britton. — Bryum Britt.; Roellia Kindb.; Mnium 

 Brotherus in Hedwigia 1893; M. Roellii Broth, in Bot. Central- 

 blatt 1890. 



Lower leaves distant ovate acute long-decurrent entire not 

 Umbate; upper crowded not decurrent, subspatliulate with short 

 often twisted acumen, serrate in upper third, faintly reflexed 

 below, limbate by 2 narrow cellrows; upper cells oval-oblong, 

 lower oblong or narrower; costa abbreviate or short-excurrent, 

 Comal leaves oblong-lingulate. Perichetial leaves erect, shorter 

 and much narrower, long-acuminate: inner nearly entire, neither 

 limbate nor reflexed. Capsule long subcylindric pale rufous 

 not constricted; teeth yellow; lid high-conic short-apiculate pale; 

 pedicel very long, irregularly curved or geniculate. Tufts green. 



23 



