PLATE 29. PODOCARPUS MACROPHYLLA. Tangential section showing the struc- 

 ture and very resinous character of the medullary rays, in the region between 

 the spring and summer woods, x 46.8 



PLATE 30. TAXODIUM DISTICHUM. Transverse section showing a double zone of 

 summer wood and the distribution of resin cells in tangential rows. < 4<>.S 



