90 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



36. Leaves usually crispate when dry, base oval; stomata in 



neck of capsule, always superficial Ulota, p. 115 



Leaves not crispate when dry, base not oval; stomata in 



neck and upper part of capsule, mostly immersed 



Orthotrichum, p. 113 



ZT- Capsule distinctly ribbed when dry 38 



Capsule smooth, not ribbed when dry 41 



38. Capsule ovoid-cylindrical Aulacomnium, p. 125 



Capsule subglobose 39 



39. Cilia well developed Philonotis, p. 127 



Cilia none, or very rudimentary 40 



40. Leaf cells smooth Plagiopus, p. 126 



Leaf cells papillose Bartramia, p. 127 



41. Leaves papillose on upper surface Timmia, p. 127 



Leaves smooth 42 



42. Inner peristome 2-3 times as long as the outer, cilia 



rudimentary Meesea, p. 126 



Inner peristome about as long as the outer, cilia well 

 developed 43 



43. Cilia appendiculate 44 



Cilia smooth or nodose, not appendiculate. 46 



44. Leaf cells narrow, linear-rhomboidal above 



Leptobryum, p. 117 

 Leaf cells rhomboidal-hexagonal, never linear 45 



45. Plants stoloniferous; capsules clustered. . .Rhodobryum, p. 120 

 Plants not stoloniferous; capsules borne singly. .Bryum, p. 119 



46. Upper leaves ovate; cells broadly polygonal, never linear 



Mnium, p. 121 

 Upper leaves linear-lanceolate; cells narrowly polygonal 

 to linear above 47 



47. Leaves glaucous green; annulus none Mniobryum, p. 118 



Leaves green to golden yellow, often glossy; annulus 



present Pohlia, p. 1 18 



48. Plants growing on rocks or in crevices 49 



Plants growing on earth 51 



49. Leaves without a midrib; stalk less than i mm. long; lid 



apiculate Hedwigia, p. 128 



Leaves with a midrib; stalk 2-10 mm. long; lid rostrate. ... 50 



50. Usually growing on calcareous rocks; capsule smooth 



Hymenostylium, p. 106 

 Usually growing on non-calcareous rocks; capsule ribbed 



Ancectangium, p. 112 



