37 



148. LeucoLepis. Stem-leaves (principally above) 

 with elongate cells; branch-leaves with round-polygonal, 

 small cells. Capsule symmetric; endostome orange; cilia 

 not^ appendiculate. Habit of Thamnium. 



B. Stem not tree-like. 



a. Capsule lateral. 



II. Rhizogoniece. Capsule asymmetric and curved. 



149. Rhizogonium. Leaves smooth, setiform ; upper 

 cells small and rotundate, the basal ones subquadrate. 



b. Capsule terminal. 



a a. Leaves sheathing; upper cells usually papillose. 

 in. Timmiece. Capsule symmetric. Leaf-cells small, 

 round-hexagonal. 



150. Timmia. Capsule not striate. Habit of Poly- 

 trichum. 



bb. Leaves not sheathing, smooth or (in some species 

 of Aulacomnium) papillose above. 



IV. Aulacomnieoe. Leaves usually papillose; cells 

 small, generally rotundate. Capsule often asymmetric, 

 usually striate when dry. 



151. Aulacomnium. Stem often with pseudopodia 

 (sterile gemmiform shoots). 



V. Mniece. Leaves smooth; cells polygonal, mostly 

 large. Capsules generally symmetric, not striate, often 

 clustered Subterranean stem generally rhizomatic, often 

 stoloniferous. Lowest leaves mostly squamiform. Tufts 

 generally loose. 



152. Mnium. Capsules symmetric, often clustered ; 

 endostome orange ; cilia not or indistinctly appendiculate. 

 Leaves serrate or entire ; cells nearly uniform, generally 

 round-hexagonal, .in one species suboval-oblong. Para- 

 physes claviform. 



153. Roellia (new genus). Capsule symmetric, soli- 

 tary; endostome hyaline; cilia not appendiculate. Leaves 

 serrate; cells diversiform, mostly oblong-lanceolate or the 

 uppermost oblong-oval. Male flowers unknown. 



154. Rhodobryum. Capsules more or less asymme- 



