26 STUDY OF NUTS MICROSCOPIC IDENTIFICATION. 



the walnuts, but not so elongated as those of the pecan (fig. 9, A). 

 The walls are moderately thick and somewhat beaded. The stomata 

 are nearly circular and about 30 ^ in diameter. They are rather less 

 numerous than in the pecan. The guard cells are comparatively 

 broad and the opening fairly wide. 



In the transverse section (fig. y, B) the outer tissue is found to 

 have a thickness of about 30 [Ji and to be composed of two or three 

 layers of cells. The inner periderm layer is like that of the pecan. 

 The endosperm is 25 to 30 JJL thick and is composed of a single layer 



A B 



FIG. 9. Hickory nut : A Epidermis of integument showing nearly isodiametric cells 

 (X175) ; B Section of integument and superficial tissues of kernel (X175). 



of cells, many of which are divided by horizontal walls. The embryo 

 tissues resemble those of the pecan and contain aleurone grains 

 slightly smaller than those in that species. 



MISCELLANEOUS NUTS. 



HAZKLNUT, FILBERT, OB COBNUT. 



(Corylus avellana L., and other species, Family Betulacece.) 



Although the names " hazel " and " filbert " are not regarded as 

 strictly synonymous, they are loosely used and there is no well- 

 marked distinction between the nuts to which these terms are applied. 

 The literal meaning of filbert is " full beard," and according to 

 Fuller 1 this name should be applied to those varieties in which the 

 husk is fringed and extends beyond the nuts, while varieties with a 

 short husk should be termed " hazel." Others apply the name " fil- 

 bert " to the cultivated nuts, reserving the term " hazel " for the wild 

 forms. The cultivated varieties are mostly derived from the Eu- 



*Nut Culturist, p. 118. 



