PLATE LXII. 



Figs. 17, 18, and 19. Cross section of midrib of Q. rubra, showing 

 manner of ending of middle vascular bundle. Phloem stippled. 



Figs. 20, 21, and 22. Cross section of midrib of Q. coccinea, showing 

 manner of ending of middle vascular bundle. Phloem stippled. 



Figs. 23, 24, and 25. Cross section of midrib of Q. schneckii, showing 

 manner of ending of middle vascular bundle. Phloem stippled. 



Figs. 26, 27, 28, 29, and 30. Cross section of midrib of Q. macrocarpa, 

 showing manner of ending of middle vascular bundle. Phloem stippled. 

 Fig. 31. Cross section of stem of Q. rubra, current year: w, pith; 

 x, xylem; y, phloem; z, bast, x 12. 



Fig. 32. Cross section of stem of Q. schneckii, current year: w, x, y, 

 and z same as in fig. 31. X 12. 



Fig. 33. Cross section of stem of Q. coccinea, current year: w, x, y, 

 and z same as in fig. 31. X 12. 



Fig. 34. Cross section of stem of Q. macrocarpa, current year : w, x, 

 y, and z same as in fig. 31. X 12. 



Fig. 35. Wood fiber of Q. macrocarpa. X 55. 

 Bast fiber of Q. macrocarpa. x 55. 

 Wood fiber of Q. rubra, x 55. 

 Bast fiber of Q. rubra, x 55. 

 Wood fiber of Q. schneckii. x 55. 

 Bast fiber of Q. schneckii. X 55. 

 Wood fiber of Q. coccinea. x 55. 

 Bast fiber of Q. coccinea. X 55. 



