PLATE XVIII. 



Sphagnum acutifolium, Ehrhart. 



Fig. a. — Plant of the typical form. 



„ i. — Part of stem with a branch fascicle. 



„ 2. — Male inflorescence. Fig. lb. — Bract and antheridium from same. 



„ 3. — Fruit and perichsetium. Fig. 4.— Bract from same. 



„ 5. — Stem leaves. Fig. 5 a a. — Areolation of apex of same. 



„ 6. — Leaves from middle of a divergent branch. 



„ 6 a £.— Areolation of base. Fig. 6x. — Transverse section. 



„ 6p. — Point of same. Fig. 6c. — Cell from middle X 200. 



„ 7. — Basal intermediate leaves. Fig. 8. — Leaf from a pendent branch. 



„ gx. — Part of section of stem. 



„ 10. — Part of a branch denuded of leaves. 



