PLATE XV. 



1. Tetraplodon angustatus. 



a. plant, nat. size. c. veil, magnified. 



b. leaf, magnified. d. sporangium with lid, magnified. 



e. sporangium without lid, magnified. 



2. T. mnioides. 



a. plant, nat. size. c. sporangium with lid, magnified. 



b. leaf, magnified. d. sporangium without lid. 



e. portion of peristome, magnified. 



3. Splachnum sphaericum. 



a. plant, nat. size. c. sporangium with lid, magnified. 



b. leaf, magnified. d. sporangium without lid. 



4. S. ampul! aceum. 



a. plant, male and female, nat. size. b. leaf, magnified. 



c. sporangium, magnified. 



5. S. vasculosum. 



a. plant, male and female, nat. size. c. sporangium with lid, mag. 



b. leaf, magnified. d. sporangium without lid. 



6. Discelium nudum. 



a. plant, nat. size. c. sporangium, magnified. 



b. leaf, magnified. d. peristome with ring and spores, mag. 



7. Catoscopium nigritum. 



a. plant, nat. size. c. sporangium, magnified. 



b. leaves, magnified. d. portion of peristome, magnified. 



8. Conostomum boreale. 



a. plant, nat. size. c. portion of peristome, magnified. 



b. sporangium, magnified. d. portion of one of the teeth, mag. 



e. leaf, magnified. 



