26 



BULLETIN 365^ U. S. DEPARTMENT OF AGEICULTUEE. 



circle. The pericycle is similar to that of Delphinium, but is dis- 

 tinguished by the fact that there are several layers of thick-walled 



A 



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XTL^Af 



co/prsx 



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Fig. 4. — A. Diagram of cross-section of stem of group 6. 

 of fibro-vascular bundle of group 6 



B. Diagram 



cells continuous with the interfascicular sclerenchyma, separating 

 the bast from the cortex. The cross section of the fibrovascular 



