JUGLANS 



163 



FIG. 71. Pericarp of fruit of Juglans regia: A, stomata of epicarp; B, cross- 

 section of pericarp showing epidermis (e), cells with reddish-brown contents 

 (c), sclerotic cells (s), parenchyma (p) containing protoplasm and starch 

 grains; C, mestome strand of the sarcocarp showing vessels (v), libriform (I), 

 leptome (s), parenchyma containing protoplasm and starch (p); D, non- 

 glandular hairs from the apical and basal portions of fruit; E, glandular 

 hairs from base of fruit similar to those found in large numbers on the sur- 

 face of the butternut (Juglans cinerea); F, rosette aggregates resembling 

 the membrane crystals of Rosanoff; G, sclerotic cells found in the powder; 

 H, fragment of non-glandular hair; K, starch grains from G.002 to 0.010 

 mm. in diameter: L, tracheae with annular markings* M, calcium oxalate 

 crystals. 



