158 BULLETIN OF THE UNIVERSITY OF WISCONSIN. 



B. Green protonema not persistent. 

 Margins of leaves flat or incurved. 

 Leaves lance-obovate to broad ovate or ovate lanceolate, 

 not abruptly pointed. 

 Margins dentate or serrate . . . Physcomitrella, 39. 



Margins entire Voitia, 4^, 4S. 



Leaves linear-lanceolate to subulate or abruptly pointed. 



Calyptra mitrate Brnchia, 45. 177. 



Calyptra cucullate Pleuridinni, 43. 177. 



[Astomuni may be sought herej 



Margins of leaves more or less revolute. 



Capsule spherical Sphserangium, 40. 1 76. 



Capsule short-pointed. 



Calyptra mitrate Microbryum, 45, 37. 



Calyptra cucullate Fhascnm, 41. 177. 



II. STEGOCARPI. — Capsule with a deciduous operculum. 



A. AcKocAEPi. — Capsule at the apex of the stem, either the m,ain 

 shoot or a well developed branch. (B on p. 166.) 



I. Mouth of the capsule naked. (2 on p. 159.) 



[Weisia viridula vars. may be sought here.) 



* Leaf-cells isodiametric, at least above the middle of the leaf, often 



obscure. (* * on p. 159.) 

 Lid imperfectly formed, persistent . . , Astomnm, 51. 1 78. 



Lid perfect, deciduous. 

 Capsule immersed. 



Leaves lamellose Pharomitrinm, 100. 



Leaves not lamellose. 

 Apex hyaline or prolonged into a hyaline hair. 

 Perichaetial leaves ciliate .... Hedwig'ia, 152. 

 Perichaetial leaves not ciliate . . . Grimmia, 134. 197. 

 Apex obtuse, plants robust, blackish . Scouleria, 137. 197. 



Capsule exserted, ribbed when dry. 

 Calyptra cucullate. 

 Leaves with long hyaline points . . . Braunia, 152. 

 Leaves not hyaline pointed. 

 Capsule contracted below the orifice Amphoridium, 158. 201. 

 Capsule not contracted below the orifice . Zygodon, W6. 201. 

 Calyptra campanulate-mitrate, plicate, usually 



hairy Macromitrium, 178. 206. 



