246 BRYACE^. [Mnium. 



mens of three of Drummond's sets has failed to show a single dioecious 

 plant; hence Schimper's reference is still uncertain. 



11. M. orthorrhynchum, Bruch & Schimp. Dioecious. 

 Differs from tlie preceding in the inflorescence, the plants 

 somewhat more sohcl and more densely foliate, with a slightly 

 smaller areolation, the teeth more acute, the costa spinulose on 

 the back, the male flowers discoid and polyphyllous, the capsule 

 subventricose, slightly curved upwards, as also the beak of the 

 lid, which is somewhat longer and thicker, and the spores twice 

 as large. — Bryol. Eur., t. 391. 



Hab. Niagara Falls {Clinton); Easton, Penn. (James); Ontario (il/a- 

 coun); Colorado {BothrocJc & Wolf); British America (Drummond). 



12. M. lycopodioides, Schwaegr. Dioecious : plants loosely 

 cespitose, slender, dirty green : lower leaves distant, oblong, the 

 upper gradually larger and long-lingulate, the perich;:etial sub- 

 linear, all cuspidate by the excurrent reddish brown costa ; 

 teeth of the brown margin close and sharply acute ; areolation 

 dense : capsule horizontal, longer than in the last two si^ecies, 

 subcylindrical and more or less incurved, brown ; teeth longer. 

 — Suppl. ii. 2. 24, t. 160; Bryol. Eur. t. 392. 



Hab. Borders of rocky brooks in pine woods ; Adirondack Mountains 

 {Lesquerenx); White Mountains {James); Canada {Mrs. Boy). 



13. M. umbratile, Mitt. Dioecious : plants loosely cespi- 

 tose or gregarious, dark green : leaves loosely spreading, the 

 lower smaller, oblong, acute or very entire, the upper elliptical- 

 oblong, short-apiculate, long-decurrent, Avith narrow doubly 

 serrate borders ; costa percurrent ; cells of the areolation 

 rounded, thick-walled ; inner j)erichaetial leaves short, lanceolate, 

 the outer long-linear, narrower than those of the stem : capsule 

 solitary, cylindrical-oblong, narrowed at base, curved, subinclined 

 or horizontal on a long reddish flexuous pedicel ; lid pale, con- 

 ical, beaked. — Journ. Linn. Soc. viii. 30; Sulliv. Icon. Muse. 

 SuppL 51, t. 35. 



Hab. Mountain Rocks, Portage River ( Drummond) ; Galton Mountains, 

 British Columbia {Lyall). 



Resembles in its foliage M. serratum, Brid., but is allied by its inflores- 

 cence to M. ortJiorrhynchum, differing from it in its softer leaves, with 

 cells four times as large, and also from the last species, whose cells are 

 only half as large and the comal leaves long and narrow. 



14. M. spinosum, Schwaegr. Difficious : plants widely 

 and loosely cespitose, stout, dark purple, often 2-3-parted; 



