IS8 MOSSES WITH A HAND-LENS 



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

 mature in April and May. 



FiGURB 82. AstereUa 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. commutata of authors). The 



Figure 83, Preissia commutata (After Bischoff.) A. 

 Antheridial plants natural size. B. Und^side of anthe- 

 ridial receptacle. D &-E. Fruiting receptacles.' G. Peri- 

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



