14 A MANUAL OF MOSSES 



34. Leaves glaucous {Saelania) 



34. Leaves glossy-green Ditrichum, p. 53 



35. Plants living on trees Drummondia, p. 116 



35. Plants living on earth or rocks 36 



36. Leaf-margins entire, distinctly in- 

 volute above Weisia, p. 91 



36. Leaf-margins minutely crenulate, 



plane Trichostomum, p. 94 



37. Inner peristome usually distinct, lacking 



a basal membrane 38 



37. Inner peristome furnished with a distinct 



carinate basal membrane 41 



38. Calyptra cucullate Funaria, p. 134 



38. Calyptra mitrate 39 



39. Calyptra smooth, not plicate, extending 



below the capsule Bncalypta, p. 105 



39. Calyptra only partially enclosing the 



capsule, plicate and usually pubescent. 40 



40. Leaves crisped when dry, base 



oval; neck of capsule with stomata 



superficial Ulota, p. 12I 



40. Leaves not with an oval base and 

 not crisped when dry; neck of cap- 

 sule with mostly immersed stomata Orthotrichum, p. 117 



41. Capsule ribbed when dry 42 



41. Capsule smooth, not ribbed when dry. 45 



42. Capsule ovoid-cylindrical; inner 



and outer peristomes of equal 



length , Aulacomn'mm, p. i69> 



42. Capsule sub-globose; inner per- 

 istome shorter than the outer... 43 



43. Cilia well developed Philonotis, p. 176 



43. Cilia rudimentary or absent 44 



44. Leaf-cells papillose Bartramia, p. 173 



44. Leaf-cells smooth Plagiopus, p. 173 



45. Upper leaf surface papillose Timmia, p. 180 



45. Upper leaf surface not papillose 46 



46. Segments 2 to 3 times as long as 



the teeth; cilia rudimentary Meesea, p. 171 



46. Segments and teeth of about equal 

 length; cilia well developed.... 47 



47. Cilia appendiculate 48 



47. Cilia not distinctly appendiculate.... 49 

 48. Large stoloniferous, Mnium-lilie 



plants with clustered capsules Rhodobryuin, p. 156 



48. Smaller, non-stoloniferous mosses 



with the capsules borne singly.... Bryum, p. 147 

 49. Leaf-cells narrow, linear-rhomboidal 



above Leptobryum, p. 138 



49. Leaf-cells rhomboid-hexagonal, never 



linear 50 



50. Large plants with the upper leaves 

 ovate; leaf-cells not more than 



twice as long as broad Mnium, p. 158 



50. Smaller plants with linear-lanceo- 

 late 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 glaucous green Mniobryum, p. 145 



