PLATE XII. 



1. Hypiium pulchellum. 



a. leaves, magnified. 



b. sporangium, magnified. 



2. H. denticulatum. 



a. leaf, magnified. 



6. sporangium, magnified. 



3. H. elegans. 



a. leaf, magnified. 



b. sporangium, magnified. 



4. H. undulatum. 



a. leaf, magnified. 



b. sporangium, magnified. 



5. Pylaisia polyantha. 



a. leaf, magnified. 



b. sporangium, magnified. 



c. portion of peristome, magnified. 



6. Homalothecium sericeum. 



a. leaves, magnified. 



b. sporangium, magnified. 



