38 ART. 4. A. YASUDA : ON THE 



Äctinostemma racemomm 0.040 mm. 



Melothria japonica 0.030 ,, 



Gymnostemma cissoides 0.025 ,, 



(b) Xylem. The xylem in the roots is well-developed and 

 occupies the greater part of them. The sizes of the vessels in 

 the roots are somewhat smaller than those of the stems. 



Inter cellular Spaces. The intercellular spaces in the cortex 

 of young roots are numerous and large. Those found in the 

 roots of Äctinostemma racemosum are exceptionally large, a trans- 



1) H. A. LoTAB. loc. cil. p. 132. 



