66i 
Foliar Ray in the Wood of the Dicotyledons . 
Fig. ii. Castanopsis tribuloides. Transverse section of the mature wood of the stem, showing 
the remains of a once strongly developed aggregate ray. x 60. 
Fig. 12. Castanopsis tribuloides. Transverse section of the mature root, showing evidence 
of the reduction of aggregate rays in the root, x 60. 
PLATE LXIII. 
Fig. 13. Castanopsis tribuloides. Transverse section ot a mature twig, showing the strongly 
depressed segments produced by well-developed approximated foliar rays, x 10. 
Fig. 14. Castanopsis indica. Transverse section of a mature stem, showing the persistence of 
five well-developed depressed segments, x 10. 
Fig. 15. Quercus velutina. Transverse section of a mature twig, showing five small depressed 
segments which are produced by five pairs of closely approximated lateral leaf-trace rays, x 20. 
Fig. 16. Castanopsis hystrix. Transverse section near the node of the mature twig, showing 
the persistence of two strongly depressed segments (y) which are related to the lateral leaf-traces 
of this node. Indications of the three other depressed segments ( x ) are more or less feebly 
developed, x 10. 
Fig. 17. Castanea pumila. Transverse section of a vigorous mature twig, showing the 
retention of five depressed segments after the disappearance of the foliar rays, x 10. 
