IX. 



Figure 62. 

 fp. 159) 



Pigare 63, 

 (p. 159) 



.Figure 64< 

 (p. 160) 



Figure 65, 

 (p. 161) 



Figure 66. 

 (|>, 161) 



Figure 67 

 fp. 165) 



Figure 68, 

 fp. 166) 



Figure 69. 

 (p. 177) 



Figure 70. 

 (p. 178) 



Figure 71. 

 (p. 178) 



Figure 7E. 

 (p» 184) 



Jiongitudinal section through the end of a 



cutting hearing a oallus. At c-c extensive 

 callus masses have developed from the 

 i^ambiuffi. H, wood, R, bark, (Original) 



■Po^pulus . Cross-section through the end of a 

 CTrEtiiig, cut Planting, hearing callus. 

 Below, xylera with duct (G) and medullary 

 ray (M) , above, large cel.led callus. At 

 R the cut surfc-ce, (Original) . 



TJlnms , Jiongitudinfil sectibn through the 



""lohde" wedge. H wood, R. barlr, C "lohde 

 wedge" produced from the Tzambium. Compare 

 also the test, (Original) 



Abies cephalonica* Sngential longitudinal 

 section of the upper edge of a' girdling 

 woimd. Above, normal trauhfesds, below, 

 (near the edge' of the wound) parenchyma, 

 in the middle, some cells which show above 

 a tracheid character, below, that of wood 

 parenchyma cells, (After MS.ule) . 



Populus pyramid alis . Cross-section -tiirough th6 

 upper encL of a cutting which had been cut 

 slanting, H, wood, M groups of bast 

 fibres, 0, callus of the bark, below it, 

 callus of the cambium, !Phe cells of the 

 callus in regularly radial rows, indicated 

 in the figure by curved lines, (Original) 



Po:{3Ulus pyra mi dal is . Part of the callus tis- 

 sue. Between the thin-Ti/alled parenchyma 

 cells lies a tracheid. (Original) . 



Pyrus Mgilus , 2hread-like cell excrescences 

 from the core. On the outer side of the 

 membrane (left in the figure) drop-like 

 protuberances are visible, (After Sorauer) 



Abies cephalonic a. Tangential longitudinal 

 section from wound wood. Above, transition 

 djo the normal course of the fibres; below 

 course of the fibres along the edge of the 

 wound; in the middle the knarl-gaiiS, 

 (After Maule) . 



Oydonia japonica . Iracheids from wound wood, 

 3artlywith spiral band, partly without 

 It. (After Vochting) . 



!^ 



Diagranaaatic pepre^entations of a v/ound wood 

 knail, (After Maule) . 



gagu$ , Oross-section of part of a branch of 

 beech bearing a sphaeroblast. In the bark 

 lies an isolated sphareoblast with wood, 

 bark and medullary rays, .{After Kjriek) . 



