258 



PRIMARY ARRANGEMENT OF TISSUES. > 



In the internode of Nef^nties ' there is fouSd 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 loithoUt. The 

 pairs of Ifeave^ and the bundles belonging 

 to them numbered in order ; 9n 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. 



FIG. 115. — Osbeckia canescens (magnified about 25). Longitudinal 

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

 Six decussating pairs' of leaves numbered in order ; in s 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, I.e., compare p, 249. — Korthals, Verhandelingen, l.c.j 

 compare p. 226. 



