30 



BRYACE^. 



Calyptra cucul- 



TrjBE IV. GRIMMIE^. Plants tufted or pulvinate. Leaves short, 

 solid, often piliferoiis-acuminate; areolation dense, obscure, puncti- 

 forni, minutely round-quadrate and chloropliyllose above. Capsule 

 regular, on a straight or arcuate pedicel. Teeth 16, transversely 

 articulate, entire, cribrose or variously cleft, rarely absent. Calyptra 

 generally niitriform, sometimes split on one side or lobed. 



Plants floating in long tufts, 

 late. Teeth cancellate. 



Leaves hair-pointed. Calyptra lobate-mitrate. 

 Capsule emerging on an arcuate pedicel; 

 teeth cribrose or lacunose. 



Plants pulvinate. Capsule immersed. 

 Teeth cribrose. 



Capsule immersed. Lid persistent. 

 Teeth 32. 



Capsule on a short curved pedicel. Teeth 

 none, or cleft or perforated. 



Capsule erect on a straight pedicel. 



Plants large. Calyptra niitriform-subulate. 

 Teeth irregularly cleft to below the middle, 

 or to the base into two filiform segments. 



45. Cinclidotus. 



4G. Grimmia. 



Subgen. ScJiistidium. 



Subgen. Scoiileria. 



Subgen. Gasterogrimmia. 

 Subgen. Gumbelia. 



47. Racomitrmm. 



Leaves hyaline, ciliate at apex. Capsule im- 

 mersed. Peristome none. 



Capsule long-pedicelled, pyrif orm or turbinate. 



48. 

 49. 



Hed"w^igia. 

 Braunia. 



Tribe V. ORTHOTRICHE^. Plants tufted. Leaves of close texture, 

 as in Grimmia. Calyptra mitriform (cucullate in n. 53 and 54), 

 plicate, often hairy. Peristome rarely absent, simple or double, 

 the outer of 8 bigeminate or 16 geminate flat short lanceolate entire 



or perforated teeth, the inner 

 lanceolate segments. 



of 8 or 16 simple filiform cilia or 



Calyptra 



Teeth cribrose. 



the capsule to the base. 



Calyptra covering the capsule to the middle. 

 Teeth narrowly lanceolate. 



Calyptra covering the capsule to below the 

 base, plicate and cleft at base. Teeth entire. 



Capsule striate, urceolate. Calyptra cucullate. 



Calyptra large, cuculliform. Teeth short, 

 truncate. 



Leaves long, flexuous, crisp when dry. Calyp- 

 tra hairy. 



Leaves shorter, striate when dry. Capsule 

 mostly immersed, 8-16-striate. Calyptra 

 campauulate, naked or hairy. 



Calyptra campanulate, plicate, laciniate at 

 base. 



Calyptra campanulate, not plicate. Teeth 



spirally revohite. 

 Calyptra very large, cylindrical-campanulate, 



covering the whole capsule. 



Calyptra twisted, persistent, plicate, con- 

 stricted at base, enclosing the capsule. 

 Peristome none. 



50. 



51. 



Coscinodon. 

 Pty chomitrium . 



52. Glyphomitrium. 



53. Amphoridium. 



54. Drummondia. 



55. Ulota. 



56. Orthotrichum. 



57. Macromitrium. 



58. 



59. 



Schlotheimia. 

 Encalypta. 



60. Calsonperes. 



I 



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