Bkown. — On the Genus Orthotrichum. 



445 



Fig. 23. — Orthotrichum magno- 

 thecum. 



1. Capsule. 



2. Calyptra. 



3. Peristome. 



4. Inner perichastial leaf. 



5. Upper stem leaf. 



6. Middle stem leaf. 



Fig. 24. — Orthotrichum cyathi- 

 forme. 



1. Capsule. 



2. Calyptra. 



3. Peristome. 



4. Inner perichastial leaf. 



5. Outer perichastial leaf. 



6. Upper stem leaf. 



7. Lower stem leaf. 



Fig. 25. — Orthotrichum acutifolium. 



1. Capsule. 



2. Capsule and operculum (imma- 



ture). 



3. Calyptra (immature). 



4. Peristome. 



5. Inner perichaetial leaf. 



6. Outer perichastial leaf. 



7. Upper stem leaf. 



8. Middle stem leaf. 



9. Lower stem leaf. 



Plate XL. 



Fig. 26. — Orthotrichum htirunui. 



1. Capsule. 



2. Capsule with operculum scarcely 



mature. 



3. Calyptra. 

 4i Peristome. 



5. Inflorescence. 



6. Inner perichastial leaf. 



7. Outer perichastial leaf. 



8. Upper stem leaf. 



Fig. 27. — Orthotrichum minutum. 



1. Capsule. 



2. Calyptra. 



3. Peristome. 



4. Inner perichaetial leaf. 



5. Outer perichastial leaf. 



6. Upper stern leaf. 



7. Middle stein Jeaf. 



Fig. 28. — Orthotrichum breviros- 

 trum, 



1. Capsule and operculum. 



2. Calyptra. 



3. Peristome. 



4. Inner perichastial leaf. 



5. Outer perichastial leaf. 



6. Upper stem leaf. 



7. Middle stem leaf. 



Fig. 29. — Orthotrichum avonense. 



1. Capsule. 



2. Calyptra. 



3. Peristome. 



4. Inner perichastial leaf. 



5. Outer perichastial leaf. 



6. Upper stem leaf. 



7. Middle stem leaf. 



8. Lower stem leaf. 



Fig. 30. — Orthotrichum nudum. 



1. Capsule. 



2. Calyptra. 



3. Peristome. 



4. Inner perichastial leaf in situ. 



5. Outer perichastial leaf in situ. 



6. Upper stem leaf. 



7. Middle stem leaf. 



Fig. 31. — Orthotrichum minimi- 

 folium. 

 1., Capsule. 



2. Operculum. 



3. Calyptra. 



4. Peristome. 



5. Inner perichastial leaf. 



6. Outer perichastial leaf. 



7. Upper stem leaf. 



8. 9. Middle stem leaves. 



Plate XLI. 



Fig. 32. — Orthotrichum obtusattcm. 



1. Capsule, with inner perichastial 



leaf in situ. 



2. Operculum. 



3. Calyptra. 



4. Peristome. 



5. 6. Upper stem leaves. 



7. Middle stem leaf. 



8. Lower stem leaf. 



Fig. 33. — Orthotrichum parvuium. 



1. Capsule. 



2. Calyptra. 



3. Inner perichastial leaf. 



4. Outer perichastial leaf. 



5. Upper stem leaf. 



6. Middle stem leaf. 



7. Lower stsm leaf. 



