46 



OF WOOD IN GENERAL 



White and Green Ash, F. americdna and 

 F. viridis. 

 > .. Vessels in summer wood not united in peri- 

 pheral lines. Enghsh, Black and Red Ash, F, 

 excelsior (Fig. 31), F. sambucifolia, F, 

 pubescens. 

 (b) Heart wood yellow, very heavy and very 

 hard. Osage Orange, Madura. 

 §§ Wood light and soft : vessels in summer wood in 

 groups of 10-30. Catdlpa. 

 JJ Pith-rays very fine, but distinct : heartwood red- 

 dish brown : sapwood yellowish white : vessels 



Fig. 32.— Transverse section of Bastard Bullet-wood {Humiria Jloribunda). 



in summer wood single or in shor^ lines : 

 odour. Sassafras. 

 JJJ Pith-rays fine, b^^t distinct. 



§ Very heavy and hard : heartwood dark yellowish 

 brown : sapwood yellow : vessels 1-10 to- 

 gether, filled, so appearing as yellow dots. 

 Black Locust, Rohinia. 

 §§ Heavy : moderately hard or hard. 



(a) Vessels in summer wood very minute, usually 

 in small clusters of 1-8, open : heartwood 

 yellow to h/rh. orange-brown, reddening on 



