CLASSIFICATION OF HARD- WOODS. 



59 



Pores in summer wood fewer but larger : heart- 

 wood dark brown. Red and Black Oaks of 

 U.S.A., Q. rubra, tinctdria. 

 Pores few, gradually but slightly diminishing 

 across the entire ring : wood very dense and 

 heavy. Live Oaks, Q. wrens of U.S. A., Ilex and 

 Suber (Fig. 36) of Europe. 



FIG. 37. Transverse section of Judas-tree (Cercis Siliqudstrum). 



tttt Pith-rays moderately broad and distinct: vessels 

 in spring wood very large, those in summer wood 

 much smaller, 1 8 together : heart wood brown- 

 ish yellow : sap wood white. Judas tree, Cfrcis 

 (Fig. 37). 



**** y esse i s i n summer wood mostly but little smaller 

 than those of the spring wood, scattered, solitary, 

 or few together. Mostly hard, heavy woods, 

 t Fine peripheral lines of wood-parenchyma : pith- 



