PLATE LVIII. 



Fig. 30. Cross section of very young stem, X 25: a, multiple epi- 

 dermis; a, collenchyma; 6, parenchyma; c, starch sheath; d, phloem; 

 e, xylem; /, pith. 



Fig. 31. Cross section of a slightly older part of the same stem, X 25. 

 Index same as for fig. 30. 



Fig. 32. Section of same stem slightly older, x 25. Index same as for 

 fig. 30, except i, bast fibers. 



Fig. 33. Older section of the same stem, x 25. Index the same as for 

 fig. 32. 



Fig. 34. Older section of stem, X 25: a, cork tissue; b, starch sheath; 

 c, original bast fiber bundle; d, bast produced by the cambium; /, water 

 tubes; g, pith. 



Fig. 35. Older pai't of stem, x 25. Index same as for fig. 34. 



Fig. 36. Cross section of root, X 25: a, cork; b, parenchyma of the 

 cortex; c, parenchyma of the pericycle and of the medullary rays, filled 

 with starch ; d, phloem tissue ; /, water-conducting tissue. 



