VERMONT MOSSES. 



37. — Ivcaves undulate-crisped when dry. 



Leaves not undulate-crisped when dry. 

 38. — Capsule 4-6-angled. 



Capsule not angular. 

 39.— Capsule symmetric, erect. (Sometimes inclined in age.) 



Capsule unsymmetric, inclined, oblique, or pendent. 

 40. — Teeth perfect, linear or filiform. 



Teeth broadly or narrowly triangular-lanceolate. 

 41.— Leaves ecostale; aquatic, floating. 



Leaves costate; not aquatic. 

 42. — Lower median leaf-cells linear; hairs of calyptra flexuose. 



Catharinea. 



38. 



Polytrichum. 



Pogonatum. 



40. 



43. 



41. 



42. 



Fontinalis. 



Leersia. 



Weissia. 



Lower median leaf-cells hexagono-rectangular; hairs of calyptra straight. 



Orlhotrichum. 



43.— Leaves linear. Leptobryum. 



Leaves lanceolate or broader. 44. 



44. — Calyptra inflated-vesiculose ; segments shorter than the teeth or rudimentary. Funaria 



Calyptra not inflated- vesiculose; segments nearly equaling teeth in length. 45. 



45. — Capsule striate. 46. 



Capsule smooth. 49. 



46. ^Capsule subglobose. 47. 



Capsule elongated. 48. 



47. — Branihes not fascicled ; synoicous or monoicous. Bartramia. 



Branches fascicled ; dioicous with male flowers discoid. Philonotis. 



48. — Leaves coarsely serrate to middle ; autoicous. Orthopyxis. 



Leaves serrulate near apex only ; dioicous. Gymnocybe. 



49.— Seta straight. Meesea. 



Seta arcuate at summit. 50. 



50.— Cilia appendiculate (in all our species). Bryum. 



Cilia not appendiculate. 5I" 



51. — Leaves lanceolate; leaf-cells narrowly rhombic-hexagonal inclining to linear. Pohlia. 



Leaves oblong, ovate to obovate or broader; cells round-hexagonal. Mnium. 



SPHAGNUM Dill. Boa moss. Peat Moss. 



All the species of this genus grow in wet boggy places. 



I. — Cuticular cells of stem and pendent branches fibrillose as in the large leaf-cells; branch 

 leaves scabrous at the back of apex. 2. 



Cuticular cells of stem and branches not fibrillose; branch leaves not scabrous at the 

 back of apex. 3. 



2.— Chlorophyllose cells of branch leaves (in cross section) exposed on the inner surface. 



cymbifolium. 



