Birch (Behula) showing Pil-h FlecKs. 

 1. Transverse sect-'ion. 2.Tangenhal secMon 



Olive (Olea europea) showing False Rings 



Photo: J. A. S. Stendall. 

 Fk;. 3. Pith Flecks, page 53. 



'* False Rinji!-," page 44. 



