240 



WALNUT 



glabrous, about 4 6 cm. in diameter and dehiscing 



irregularly. Pollen nearly white, irregularly polyhedral, 



beset with numerous minute warts : up to 50 p in diameter. 



The catkins are dwarf shoots in the axils of leaves 



Fig. 76. Walnut, Juglans regia. 1, flowering shoot, bearing a a 

 male catkin and 6 a female inflorescence ; 2, male flower with a a stamen 

 seen from within, b one from the side; 3, female flower; 4, vertical 

 section of same; 5, fruit with one half removed; 6, vertical section, 

 through the nut; 2, 3 and 4 enlarged, p. 239 (Wo). 



