158 



MOSSES WITH A HAND-LENS 



neath. In fruit the fringed perianth is unmistakable. The spores 

 mature in April and May. 



FIGURE 82. Asterella tenella (After Bischoff.) A. Group of fruiting 

 plants natural size. E. Section through the fruiting receptacle. The other 

 figures are self explanatory. The drawing at the right shows underside of 

 thallus X 2. 



PREISSIA. 



P. QUADRATA (Scop.) Nees. (P. comuiutata of authors). The 

 A 



FIGURE 83. Preissia commutata (After Bischoff.) A. 

 Antheridial plants natural size. B. Underside of anthe- 



ridial receptacle. D & E. Fruiting receptacles. 

 anth open; a, perianth; b, calyptra; c, capsule. 



G. Peri- 



