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MESSES. CYEIL WEST AND H. TAKEDA ON 



a series are differentiated simultaneously, that is to say, the roots belonging to a series 

 are always of the same age. These series of roots are regularly arranged on both flanks 

 of the stelar arms (text-figs. 4, 5). 



Let us consider the roots which emerge from any one lobe of the caudex. Text-fig. 12 

 represents a drawing of the lower surface of one complete lobe of a fairly young plant 

 of I.japonica, from which the roots had been artificially removed. It will be noticed 



Text-fis. 12. 



Part of the caudex of a young plant of Tsoetes jajjonica (cf. PI. 33. figs. 5 & 6) seen from below. The roots have 



been artificially removed. 



that the roots, as they emerge from the cortex, are arranged in several pairs of more or 

 less curved series on the right and left halves of the lobe. This arrangement is to be 

 explained by the fact that the series of roots which emerge from the right half of the 

 lobe are derived from the flank of one arm of the rhizophore-stele, whereas those which 



