THE LENTICELS. 85 



CHAPTER VIII. 



OF LENTICELS. 



GuETTARD was the first who described, under the 

 name of Lenticular Glands {glandes lenticulaires), the 

 spots which are observed upon the rind of the branches 

 of trees. These spots are, as Vaucher has well observed, 

 at first oblong in a longitudinal direction, then round, 

 and afterwards oblong transversely; they sometimes 

 present a flat surface, remarkable because the cuticle 

 appears there as if it were dried up ; they often become 

 convex, and frequently finish by bursting. Beneath 

 the cuticle is found a pulverulent mass, sometimes 

 greenish, at others whitish, which seems composed of 

 the cellules of the cellular envelope disunited, and of 

 the form of oval vesicles. As there is nothing which 

 announces a glandular organization in these organs, 

 I have given them the name of Lenticels (len- 

 ticellce; lenticelles) for the pui-pose of avoiding a hypo- 

 thetical term — and, nevertheless, to use the primitive 

 name, which describes their form pretty well ; and to 

 have, at the same time, the advantage of emplovino' 

 a simple, instead of a compound terra. Du Petit- 

 Thouars gives them the name of Cortical Pores (pores 



