5io 



BOTANICAL GAZETTE 



[DECEMBER 



tannin comDounds to mak 



nature of the stored material. 



Storage cells are very abundant in the diaphragms and in the 

 parenchyma of the stems of Scirpus validus, but are also present in 



Fig. 13. — Scirpus validus: cross-section of tip of very young stem: par, partitions 



phragm 



will 



Xno. 



the scales of young buds, the spongy parenchyma of the rhizome, 

 and in both longitudinal and cross-bundles. They have not been 

 observed in the. young roots of this species. 



