[TiiJ'dcfj). M. 



Fie 36a. — A Photomk'rocraph sirnwi.vc the Cambial Rkokin Xylem 

 AND Phloem in Tkansverse Suction, from the N'otni; Stem of 

 Samhncni. — x, Cambial cells; s, sieve-tnbes in the phloem; v, large 

 vessels (annular) in the xylem. 



