*k 



ISOETES JAPONICA, A. BE 



317 



Text-fig. 4. 



^ 





' // 



\ 



"':v^ 



\\\^ 





\ 



/ 



^J I i 





v.l 



Isoetes japonica. Diagram showing arrangement of primary and secondary stelar tissues. From a transverse 



section of one ol the lobes of the rhizophore-stele. X 20. 



c. 

 ct. 



cambium 

 cortex. 



mer. 



primary meristem. 



^7i},2>7i.^ = primary, secondary phloem. 



p.m. 

 r.t. 



' parenchymatous mantle.' 

 root-trace. 



Ct 



^ 



^ 



// 



Text-fig. 5. 



-i^y'-ii 



yi 



vY 



t\ 



\ 



% 



<^ 



^ 



rt 



^ 



vt 



// 



// 



// 



1/ 



Ditto : but from au oblique transverse section of a stelar lobe cut in the plane indicated 



by the line a-l of text-fig. 1. X 20. 



