MUSCI 



63 



B. Capsule inclined, irregular. 



a. Paraphyllia absent. 



b. Paraphyllia present. 



I. Leaves all alike. 



II. Leaves dimorphous. 



(0 



(3) 

 (3) 



89. Pseudoleskea 



90. Haplocladium 

 91. Thuidium 



93. Plagiothecium 

 94. Rhaphidostegium 



95. Pleuropus 

 96. Brachythecium 



Fam. 28. Hypnaceae. 



A. Leaves arranged symmetrically around the stem, sickle-shaped, one-sided. 



Alar cells modified. 



(Fig. 42.) (1) 92. Stereodon 



B. Foliage flattened ; leaves unsymmetrically squarrose. Alar cells not or 



hardly modified. 



(3) 

 Fam. 29. Sematophyllaceae. 



(7) 

 Fam. 30. Brachytheciaceae. 



A. Capsule erect and regular. 



(0 



B. Capsule inclined or horizontal, irregular. 



a. Lid conical. 



(9) 



b. Lid with a long beak. 



I. Leaves broadly ovate or elongate-oval, with a short and broad apex. 



(1) 97. Oxyrrhynchium 



II. Leaves ovate to ovate-lanceolate. 



1. Plant stout. Midrib not continued as a stiff mucro. 



(5) 98. Rhynchostegium 



2. Plant slender. 



(5) 99. Rhynchostegiella 



Sect. Leptorhynchostegium 

 Fam. 31. Rhacopilaceae. 



(1) 100. Rhacopilum 



Fam. 32. Polytrichaceae. 



A. Leaves not vaginate, but strongly marginate. Calyptra bare but rough 



towards the apex. 



(1) 101. Catharinaea 



B. Leaves vaginate, not marginate. Calyptra felt-like. 



a. Capsule cylindrical. 



(2) 102. Pogonatum 



b. Capsule 4-angled. 



(Fig. 43.) (4) 103. Polytrichum 



