THE BLACK WALNUT 379 



WALNUT. 



Juglans regia = The Common Walnut. 



Juglans nigra = The Black or American Walnut. 



Neither of these trees are native to this country. 

 Imported seed of Black Walnut should always be used. 



The timber of both species is valuable, and of a dark 

 brown colour, the sapwood being white. The Black Walnut, 

 however, grows the finest timber, and, for timber production, 

 should be grown in preference to the Common Walnut. 

 The timber of the common variety is very liable to " heart " 

 shakes, and is not of such a fine colour as that of the black 

 variety. The sapwood is very liable to be worm-eaten. 

 Any burrs on the trunks are very valuable indeed, if of 

 any considerable size. 



Soil and Situation. A deep, light, rather dry loam is 

 the best soil for Walnuts, especially if it rest on a chalky 

 or marly subsoil. Cold, stiff, clay soils or subsoils are quite 

 unsuited to it. Any excess of moisture is very harmful to 

 its growth. Both species, and especially the American 

 variety, are very susceptible to late spring and early autumn 

 frosts. A considerable amount of summer heat is necessary, 

 in order to ripen the wood ; especially is this the case with 

 the American variety. 



The American variety should only be planted in the 

 south of England. 



Southern aspects suit it best, if spring and autumn frosts 

 can be avoided. 



Cultivation, etc., of the Black Walnut. The tree is very 

 light-demanding and thinly foliaged. It forms a very long 

 tap-root, but will transplant readily if properly schooled in 

 the nursery. Wherever possible, however, it should be sown 

 in situ. In order to effect this, the best method is to 

 germinate the seed in a heap, and then to dibble the 

 already sprouted nuts into the land. It is a very fast- 

 growing tree. 



On account of the great damage done by frosts, it should 



