H^EMATOXYLON 



231 



FIG. 122. Htemaloxylon campechianum Branch. 



FIG. 123. Hamatoxylon Cross-section of wood. P, Medullary ray, consisting of two vertical 

 rows of** cells, to which the black line from R should be extended. V, Pitted vessels. FL, Ligneous 

 fibers. PL, Wood parenchyma. 



