POROXYLEAE 



5°3 



Fig. 181. — A, Poroxylon Edujardsii. Transverse section of stem, c, cavity in pith ; x, 

 primary wood of bundles, which are numbered in the order of the f s phyllotaxis, 

 No. i belonging to the lowest leaf of the series ; the angle i, c, 2, is that of the 

 divergence between two succes;>ive leaves; it and ir, the two bundles constituting 

 the outgoing leaf-trace ; x^, secondary wood ; />k, phloem. x about 5. After 

 Bertrand and Renault. B, P. Boysseiii. Transverse section of young stem. / 

 pith ; x y primary wood of bundles ; x' 1 , secondary wood ; fth, phloem ; gc % secretory 

 (?) sacs or canals; g, mucilage -canal; c, cortex; h, hypoderma. x 7. After 

 Renault. 



