24 



The Ottawa Naturalist. [April 



38. Scapania undulata, (L.) Dumort. 



Hunker Creek (68, 82 p.p.). 

 Yale University, March, 1903. 



Explanation of Plates. 



Plate I. 



Mesoptychia Sahlbergii, {Ltndb. & Arnell) Evans. 



Fig. I. Fruiting stem, x 12. 



Fig. 2. Part of stem showing i>engoni;il bracts and ordinary leaves, antical 



view. X 12. 

 Fig. 3. A leaf spread out. x 12. 

 Fig. 4. Cells from middle of leaf, one shaded to show the verruculse on the 



cuticle. X 300. 

 Fig. 5. Underleaf. x 35. 

 Figs. 6, 7. Perichaetial bracts, x 12. 

 Fig. 8. End of fruiting stem with the bracts removed, showing perianth and 



perigynium. x 12. 

 Fig. 9. Longitudinal section through same, x 16. 

 Fig. 10. Transverse section of perianth, x 12. 

 Fig. II. Teeth from mouth of perianth, x 225. 

 Fig. 12. Perigonial bract, x 12. 



The figures were all drawn from Professor Macoun's No. 57. 



Plate II. 



LOPMOZIA RuTHEANA, (Limpr.) M. A. Howe. 



Fig. I. Fruiting stem, antical view, x 12. 



Fig. 2. Part of stem showing ordinary leaves and perigonial bract, antical 



view. X 12. 

 Figs. 3, 4. Leaves spread out. x 12. 

 Fig. 5. Cells from middle of leaf, one shaded to show the verrneulse on the 



cuticle. X 300. 

 Fig. 6. Cells from apex of antical lobe, x 225. 

 Figs. 7, 8. Underleaves. x 20. 

 Figs. 9, JO. Perichsetial bracts. < 12. 

 Fig. II. Perichsetial bracteole. 20. 

 Fig. 12. Transverse section of perianth, x 12. 

 Fig. 13. Teeth from mouth of perianth, x 225. 

 Fig. 14. Perigonial bract, x 12. 



Fig. 15. Perigonial bracteole, more specialized than usual, x 20. 

 The figures were all drawn from Professor Macoun's No. 14. 



