200 NUT GROWING 



stock which would not accept the scions of any other 

 walnut, yet there are differences in degree of hospi- 

 tality. This family trait of fondness for relatives is 

 extended into the hybridizing question, and the wal- 

 nuts as a group seem to accept each other's pollen 

 freely. Some of the cultivated varieties actually de- 

 mand the presence of pollinizing neighbors, being 

 more or less sterile to their own pollen. 



One of the Asiatic walnuts, Juglans mandschurica, 

 which is a nut resembling our butternut, but rather 

 smaller and rougher, has been introduced into this 

 country as a Japanese walnut, and another Oriental 

 walnut, /. sinensis, has been imported also under the 

 name /. mandschurica, leading to some confusion. 

 There is a further tangle due to our more recent 

 information that /. sinensis, which resembles the 

 Persian walnut rather closely, is really nothing more 

 than a northern strain of the latter species. The 

 confusion in regard to the specific name, mand- 

 schurica, was due to the Yokohama Nursery Com- 

 pany making up that name for the /. regia sinensis 

 of Decandolle, not knowing that the name had al- 

 ready been applied by botanists to another northern 

 Asiatic species. It will simplify matters if we speak 

 of Juglans mandschurica of the botanists as the Si- 

 berian walnut, and the Juglans sinensis as the Chi- 

 nese walnut, and Juglans Sieboldiana var. cordi- 

 formis as the Japanese walnut, in our ordinary con- 

 versation about the dinner table. The confusion in 

 relation to the name "Japanese" walnut will continue 

 for some time. For ordinary purposes the common 



