peculiarity of this species is the change which takes place in its foliage, its vernal leaves being replaced in summer by others of a different size, form, and texture.
TAB. 59, 60.—Fontinalis biformis.
1. Planta vernalis.
2. Pars ejusdem ad æstivalem transiens.
3. Planta aestivalis, naturali magnitudine.
4. Pars plantæ masculæ.
5. Flos femineus.
6. Idem perichætialibus exterioribus exsectis.
7. Folia perichætialia.
8. 9. Flores masculi.
10. Folium perigoniale.
11. Antberidium.
12. 13, 14, 15. Folia plantæ vernalis.
16, 17, 18, 19. Areolatio folii vernalis.
20. Sectiones transversales ejusdem.
21, 22, 23. Folia plantæ æstivalis.
24. Capsula operculata et calyptrata in perichætialibus immersa.
25. Eadem sine calyptra.
26. Eadem deoperculata.
27. Capsula deoperculata cum ramulo perichætiali.
28. Folium perichætiale.
29. Basis capsulæ cum pedicello e ramulo pericbaetiali extracto.
30. Peristoma particula.
31. Operculum.
32. Calyptra.
