PHLOX CAROLINA 



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FIG. 228. Phlox Carolina: A, lower portion of plant showing long roots with 

 numerous rootlets at the ends. B, parenchyma from cortex of rhizome 

 showing two sclerotic cells (s). C, cross-section of portion of rhizome show- 

 ing parenchyma of cortex (p) which contains protoplasm and starch grains 

 endodermis (e), leptome (s), tracheae (v), libriform (t), wood parenchyma 

 (w), parenchyma of pith containing starch grains and protoplasm (pa). 

 D, isolated sclerotic cells from cortex. E, tracheae having annular and spiral 

 thickenings. F, libriform cells. G, glandular hair from the leaf. 



