60 MUSCI 



Fam. [3. Bryaceae. 



A. Sexual organs on lateral, rooting branchlets, mostly near the base of the 



stem. 



a. Outer peristome absent. 



(4) 44. Mielichhoferia 



b. Inner peristome absent. 



(1) 45. Haplodontium 



B. Archegonia inserted at the apex of the main shoot or on the principal 



branches. 



a. Membrane of inner peristome not protruding or very little only. 



(1) 46. Orthod6ntium 



b. JVlembrane of inner peristome much protruding. 



I. Inner peristome shorter than the outer one. Appendages rudimentary. 



(7) 47. Brachymenium 



II. The two peristomes equal. 



1. Cells of leaves narrow, in the apical portion narrow-rhomboid to 



linear. 



x Foliage on stem bushy. 



(7) +8. Pohlia 



x x Leafy shoots catkin /ike. 



(1) 49. Anomobryum 



2. Cells of leaves towards the apex rhombical to hexagonal. 

 x Stem without offsets. Sporogone solitary. 



(13) 50. Bryum 



x x Stem with offsets. Sporogones several altogether. 



(2) 51. Rhodobryum 

 Fam. 14. Mniaceac. 



(1) 52. Mnium 



Fam. 15. Rhizogon i aceae. 



(1) 53. Rhizogonium 

 bam. 16. Bart ram i aceae. 



A. Stem without verticillate branchlets below the fertile apex. 



(5) 54. Bartramia 



B. Stem with verticillate branchlets. 



a. Peristome absent. 



(Plate 7, C.) (1) 55. Bartramidula 



b. Peristome present. 



I. Cells at base of leaf rounded. 



(6) 56. Philon6tis 



II. All cells of leaf linear. 



(3) 57. Breutelia 

 bam. 17. Erpodiaceae. 



(2) 58. Aulacopilum 



