212 



WALNUT 



f) iij 



diaphragms with hollow chambers between, at once evident 

 on cutting (Fig. 108). The twigs are not flattened at the 

 apex. 



The stout glabrous cylindrical twigs are greenish to 

 ash-grey and have resem- 

 blances to those of the Ash 

 e.g. the prominent leaf- 

 bases and black lateral buds; 

 but the terminal or pseudo- 

 terminal bud is grey tomen- 

 tose and the laterals glab- 

 rous, the leaf-scars broadly 

 Y-shaped, or angular heart- 

 shaped, and very different, 

 and not opposite. The lat- 

 eral buds are often extra- 

 axillary or accompanied by 

 superposed accessory buds : 

 two opposite bud-scales 

 almost entirely conceal the 

 rest, which are in three 

 ranks. 



The terminal and flower- 

 ing buds may expose more 

 than 3 scales, and be dark or 

 nearly black in colour, some- 

 what shining, though micro- 

 scopically hairy. Branches 

 olive-grey to brownish, with 

 evident lenticels. 



The bud-scales are leaf- 

 bases (Figs. 48 c and 49 d). 



The young bud has a closed pjg^ ^qs. Walnut, Jugians 



enveloping scale with a regia, p. 211 (D). 



'1/ 



