PLATE V. 



1. Hypnum albicans. 



a. leaf, magnified. 



b. sporangium, magnified. 



c. lid, magnified. \j U ; ^ ^ 



2. H. lutescens. 



a. leaf, magnified. 



b. sporangium, magnified. 



3. H. plumosum. 



a. leaf, magnified. 



b. sporangium, magnified. 



4. H. velutinum. 



a. leaf, magnified. 



b. sporangium, with peristome, magnified. 



c. sporangium, with lid, magnified. 



5. H. rotabulum. 



a. leaf, magnified. 



b. sporangium, magnified. 



t. part of peristome, magnified. 



d. ring, magnified. 



6. H. rivulare. 



a. leaf, magnified. 



b. sporangium, magnified. 



