430 



Journal of the Asiatic Society of Bengal. [June, 1907 



Anatomical differences accompanied the differentiation of the 

 two sides of the branch. There was an inequality in the de- 

 velopment of the vascular ring, indicated in the next figure. 



(Th-ic\ walled corllcal Ussue containing" 



^chlorophyll 



/ 



/ f ThlnwaCed cortical tissue" 

 L^ < containing^ a Utile starch 

 "Ovv all round etem. 



scxiiar 



1 



ring- 



Fig. 4. Stem in section between 

 the first and second axils. 



It is seen that the vascular tissue was thicker on the foliage 

 side than on the "* ' "" "^ . . - - 



greater 



flowering side. 



the 



Very much of this was due to 



xylem. In figures 5 nnd 6 we 

 give drawings of the xylem of two bundles whose positions arp 

 indicated by the letters*^ and B on the figure 4. 

 were selected for illustration as tvpical of the bundles on the tw"o 

 extreme sides of the stem. "'^ ' * ' 



These bundles 



the 



is tne development 

 that the vessels- 



It is seen at once how much 



of the wood-fibres 



greater 



on the foliao^e side, and 

 the largely are pitted, the smalle 

 are wider on that side. 



r are 



The drawings 

 accurate. 



spiral — 

 were made by means of 



There was not the same difference in the phloem, nor in the 

 other tissues, which 



round the stem. 

 The axis of 



•were, more or less, equally developed all 



axisot a normal mango inflorescence, which has not 

 begun to bear fruit, is in anatomy like the flowering side of our 

 abnormality; while the greater development of wood on the other 

 side 18 as m a leafy shoot. The reader, however, will note that the 

 section, from Avhieh the drawings were made, was from between 

 i! ^^'^r^^^^ s^c^'^'i axils, ^^e., from some way below the re^on 

 where the^ leaves first appeared : in point of actual distance 



t^T'Jr'' '■''•^^'i ^*'^^''' *^^ structure of this abnormal stem, 

 the transpiring leaves had a better channel of communication 



required 



an 



had 



