58 OF WOOD IN GENERAL. 



*** Vessels in radial lines or queues, wavy or branched 



the branches often uniting, 

 f All the pith-rays very broad. 



| Wood beset with large pores : heart wood reddish - 

 brown. Vine, Vitis (Fig. 35). 



H- t 

 + + 



Wood sulphur yellow, hard : zone of vessels 

 narrow. Barbery, Berberis. 



FIG. 36. Transverse section of Cork Oak (Qutrcus Suber). 



ft Pith-rays so narrow as to be hardly perceptible : 



heartwood oak brown : zone of vessels very 



broad and vessels large, but less crowded than in 



Oak. Chestnut, Castdnea. 



Iff Some of the pith-rays very broad and easily 



visible to the naked eye. Oaks, Qutrcus. 

 I Pores in summer wood very fine, numerous and 

 crowded : heartwood light brown. White 

 Oaks, Q. alba, Mcolor, palustris, obtusiloba, etc., 

 in U.S.A. and Rdbur in Europe. 



