2=;S 



PRTMARy ARRANGEMENT OF TISSUES. 



In the internode of Nepenthes'^ there is found an inner typical bundle-ring, surrounding 

 the pith, which later undergoes secondary thickening, and externally other bundles are 





Fig. 114. — Centradenia rosea. End 

 of a shoot, halved longitudinally; the 

 three lower pairs of leaves and the epi- 

 dermis removed, made transparent by 

 potash, and seen from iLithout. The 

 pairs of leaves and the bundles belonging 

 to them numbered in order ; m the 

 median ones, / the lateral bundles. One 

 leaf of the fourth pair (4) covers the 

 growing-point In the node of pair 3 the 

 transverse girdle is as yet imperfectly 

 developed. Further description in the 

 text. Magnified about 25. 



FiC. 115.— Osbeckia canescens (magnified about 23). Longitudinal 

 half of the end of a shoot, prepared like Fig. 114. and seen from without. 

 Six decussating pairs of leaves numbered m order ; in 5 and 6 as yet no 

 bundles, in 4 the median bundle is just visible. Further description in 

 the text. 



to be seen in the very broad outer cortex : these are partly bundles of the leaf-trace, 

 which passing in a radially-oblique direction through the cortex, gradually enter the 



^ C. H. Schultz, Vaisseaux du Latex, /. c, compare p. 249. 

 compare p. 226. 



-Korthals, Verhandelingen, /. r., 



