922 



IX. Muscr. 



/A\\ 



Q Polytrichum. 

 CapsUle deprived of 



its operculum, 



showing the peri- 



stomium and the 



epiphragm (mag.)- 



9 Polytriclmm. 



Capsule capped by 



a calyptra clothed 



externally with 



silky hairs (mag.). 



Q Polyfnchum, 

 Capsule stripped 



of the outer 

 calyptra (mag.)i 



9 Polyivichum. 



Capsule cut trans- 



\'fersely, showing 



the 4-branched 



columella, and the 



sporiferous sac 



(mag.). 



?=^ 



c 



Polytrichum commune. 

 Top of S stem (mag.)- 





PolytHchum commune, 



Antherozoids (mag.). 



(Thuret.) 



Polytrickum 

 commune 9. 



Polytrichum 

 commune 3 • 



9 Polyti^hum. 

 Capsule stripped of 

 its cEilyptra (mag.)> 



Rypnum populeum. 

 Capsule and calyptra. 



Polytrichum commune. 



Paraphyses and antheridia, one of which emits 



antherozoids (mag.), (Thuret.) 



Hypnum populeum (mag.). 



Eypnum populeum 

 Dehiscent capsule. 



