B E !>0 K 



C F | L 



PLATE XXXI „ DIAGRAMS OF WOOD CHARACTERS. A, axial parenchyma distribution: (a) 

 diffuse; (b) paratracheal; (c) terminal. B, axial parenchyma few. C, axial parenchyma 

 numerous. D, vessels not changing in size in growth ring. E, vessels changing gradu- 

 ally in size in growth ring. F, vessels changing abruptly in size in growth ring. G, radial 

 vessel alinement: (a) radial chain; (b) radial multiple. H, types of vessel pairs. I, soli- 

 tary vessels. J, spacing of vessels increases in growth ring. K, spacing of vessels re- 

 mains similar in growth ring. L, types of vessel aggregates. 



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