— 8'.) — 



Leaves crowded with subulate gen. not long acumen, entire 

 and recurved below, above middle us. faintly denticulate; middle 

 and upper celle linear; costa often reaching in acumen. Stem- 

 leaves pubovate-oblong less distinctlj' triangular; branch-leaves 

 subtriangular ovate-lanceolate. Perichctial leaves long-triangular 

 filiform-pointed. Capsule us. cylindric straight; cilia rudimen- 

 tary; segments not well-evolute; annulus none; lid long-conic 

 acute; pedicel not long. Tufts compact us. green silky glossy. 

 Stem creeping; branches subjulaceous often sciuroid-curved. 

 Dioecious but often fruiting. — Trees and rocks, sometimes in 

 water. Amer. not r. Can.; Macoun. U. S.: Sullivant, com. C. 

 Mueller. 



* C.stenocarpum (Ren. et Card., as var.) Kindb. (in Hedwigia 

 1896). 



Capsule narrower; lid from convex base abruptly rostellate. 

 Leaves distinctly denticulate nearly all around. — Amer. r. 

 U. S. Wisconsin: Roell. 



S.C.spurio-acuminatum C. M. ct Kindb. — Brachythecium 

 cat. Can. m. 



Differs from C. acuminatum: Capsule curved; endostome well- 

 evolute; ciUa long. Leaves distinctly denticulate all around. 

 Perichetial leaves subulate-acuminate. Tufts loose sparingly 

 radiculose. Monoecious. — Logs r. Amer. Can.: Macoun. 



B. Branch-leaves obtusate obtuse; apical cells suboblong, 

 lower oblong-lanceolate. Stem-leaves also denticulate. 

 ^.C.alsioides Kindb. in Pittonia 1892. 



Leaves indistinctly decurrent; costa reaching to acumen or 

 in branch-leaves shorter. Stem-leaves broadly ovate-lanceolate, 

 attenuate to a short acute or subulate acumen, faintly denti- 

 culate above middle, more distinctly serrulate at acumen; alar 

 cells quadrate numerous, the others sublinear. Branch-leaves 

 narrower, more sharply serrate above. Perichetial leaves abruptly 

 narrowed to a long subuliforni denticulate often defiexed acu- 

 men. Capsule subcylindric curved; teeth orange; segments 

 yellow, lacunose in middle; cilia not appendiculate; lid flat 

 apiculate; pedicel rough about 16 centim. long. Tufts bright 

 green glossy. Stem curved pinnate; branches obtuse often cur- 

 ved when dry. Dioecious. — Rocks r. Amer. California: Mar- 

 shall A. Howe. 



3. Sericaria. 



A. Capsule us. straight symmetric; segments short; cilia none. 

 Stem-leaves somewhat long-decurrent, us. diversiform; alar cells few. 



7 



