ANATo.MV AND PHYLOGENY OF TIIK CONIFERALES. 



37 



Fig. 22. Transverse section of a root of A. nobilin, showing tlie median resin duct of the primary wood. X 15. 



Fig. 23. Transverse section of the leaf trace of A. magnified, Showing the jacket of transfusion tissue surrounding the 



phloem. X 1T>0. 



Fig. 24. Transverse section of the cone-axis of A. appolinis showing the presence of normal resin canals. X 20. 



PLATE 4. 



Fig. 25. Part of the last more highly magnified. X 40. 



Fig. 26. Section of a wounded branch of Pseudolarix. X 8. 



Fig. 27. Part of the same more highly magnified, to show the presence of traumatic resin ducts, x 40. 



Fig. 28. Section of the root of Pseudolarix, to show the median resin canal. X 20. 



Fig. 2!). Part of another root more highly magnified. X 30. 



Fig. 30. A wounded root of Pseudolarix. X 20. 



Fig. SI. Transverse section of a branch of Pseudolarix. X 15. 



Fig. 32. Transverse section of the peduncle of a female cone of Pseudolarix. X 20. 



PLATE 5. 



Fig. 33. Section of a portion of the axis of the female cone of Pseudolarix, showing the presence of cortical resin 

 canals. X 30. 



Fig. 34. Section through the base of the ovuliferous scale and the sterile bract of Pseudolarix. X 25. 



Fig. 35. Section through the sterile bract of the same. X 40. 



Fig. 36. Section through the foliage leaf of Pseudolarix. X 40. 



Fig. 37. Section through traumatic wood of Cedrus atlantica. X 20. 



Fig. 38. Section through the wounded root of the same. X 20. 



Fig. 3D. Resin canals of the same more highly magnified. X 180. 



Fig. 40. Section through the wood of C. deodara, showing the presence of both horizontal and vertical resin canals. 



X 20. 



PLATE 6. 



Fig. 41. Another section more highly magnified. X 70. 



Fig. 42. Longitudinal section of wood of the same, showing horizontal and vertical resin canals. X 15. 



Fig. 43. Another of the same. X 43. 



Fig. 44. A tangential section of the same, showing resin canals of various degrees of development in transverse section. 

 X 20. 



Fig. 45. Section of cone of Cedrus atlantica, to show absence of resin ducts in the wood. X 30. 



Fig. 46. Transverse section of the root of C. atlantica, to show median resin canal. X 20. 



Fig. 47. Transverse section of the double cortical leaf trace of C. atlantica. X 120. 



Fig. 48. Transverse section of wounded stem of Tsuga canadensis. X 10. 



PLATE 7. 



Fig. 49. Transverse section of a vigorous yearling stem of Tsuga mertensiana. X 20. 



Fig. 50. Transverse section through part of the cone of the same. X 25. 



Fig. 51. Transverse section of the axis of the cone, T. canadensis. X 25. 



Fig. 52. Transverse section of root of T. mertensiana. X 20. 



Fig. 53. Transverse section of root of T. canadensis. X 30. 



Fig. 54. Transverse section of part of a wounded root of T. canadensis. X 30. 



Fig. 55. Transverse section of center of root of the same. X 180. 



Fig. 56. Transverse section of stem of the same showing double leaf trace. X 40. 



Printed January, 1905. 



