Jennings: Manual of Mosses 13 



34. Leaves glossy-green ; -- Ditrkhum, p. 49 



35. Plants living on trees Drummondia, p. 103 



35. Plants living on earth or rocks ?o 



36. Leaf-margins entire, distinctly involute above Weisia, p. 79 



36. Leaf-margins minutely crenuh.te, plane Trichostomum, p. 82 



37. Liner peristome distinct (or adhering to inner surface of teeth), lacking a 



basal membrane 38 



37. Inner penstome furnished with a distinct, often carinate basal membrane 41 



38. Calyptra cucullate Funaria, p. 118 



38. Calyptra mitrate or campanulate 39 



39. Calyptra smooth, not plicate, extending below the capsule Encalypta, p. 93 



39. Calyptra only partially enclosing the capsule, plicate and usually pubescent 



40 



40. Leaves crisped (except U. americana) when dry, base oval, neck of cap- 

 sule with stomata superficial Ulota, p. 107 



40. Leaves not with an oval base and not crisped when dry; neck of capsule 



with mostly immersed stomata Orthotrichum, p. 103 



41. Capsule ribbed or furrowed when dry 42 



41. Capsule smooth, not ribbed when dry 45 



42. Capsule oblong, furrowed when dry; inner peristome of 64 filiform cilia 



in groups of 4's Ttmmia, p. 154 



42. Capsule ovoid-cylindrical; inner and outer peristomes of equal length 



Aulacomrtium, p. 144 



42. Capsule cylindric; inner peristome half as long as filiform teeth 



Encalypta, p. 93 



42. Capsule ovoid to sub-globose; inner peristome shorter than the outer 43 



43. Cilia well developed Philonotis, p. 150 



43. Cilia usually rudimentary or absent (see also Philonotis) 44 



44. Leaf-cells papillose or mamillate Bartramia, p. 148 



44. Leaf-cells smooth Plagiopus, p. 148 



45. Upf>er leaf surface papillose Timmia, p. 154 



45. Upper leaf surface not papillose 46 



46. Segments 2 to 3 times as long as the teeth; cilia rudimentary 



Meesia, p. 146 



46. Segments and teeth of about equal length; cilia well developed or rudi- 

 mentary 47 



47. Cilia distinctly appendiculate. (See also Pohlia) 48 



47. Cilia not much if any appendiculate 49 



48. Large stoloniferous, MniumAiVe plants with clustered capsules; leaf-cells 



less than 4:1 Rhodobryum, p. 134 



48. Smaller, non-stoloniferous mosses with the capsules borne singly; leaf-cells 



less thn 4:1 Bryum, p. 127 



48. Leaves linear-lanceolate, costa wide; leaf-cells above linear-rhomboid 



Leptobryum, p. 121 



49. Leaf-cells narrow, linear-rhomboidal above; leaves linear-lanceolate; costa wide 



and indistinct Leptobryum, p. 121 



49. Leaf-cells more or less linear; costa strong and fairly wide (see also Encalypta) 



Pohlta. p. 122 



49. Leaf-cells rhomboid-hexagonal, never linear 50 



50. Large plants with the upfser leaves often bordered, ovate; leaf-cells not 



more than twice as long as broad, rounded to hexagonal Mmum, p. 136 



50. Smaller plants with linear-lanceolate upper leaves; leaf-cells more than 



twice as long as broad 51 



51. Annulus none; leaf-cells more or less rhombic-hexagonal, never linear, except at 

 margins; leaves pale glaucous green; plants in wide, loose tufts; stems up to 



5 cm high; sporjgonia single Mniobryum, p. 126 



51. Sp>orogonia single; stems not rising from rhizone-like stolons; annulus mostly 



