1913] Babcock: New Form of Juglans 7 



young tree grown from a cion obtained from N. B. Pierce, of 

 Santa Ana, and grafted on a hybrid walnnt root of the "royal" 

 type. The tree has made rather remarkable growth. The Gar- 

 dena Agricultural High School has obtained seeds of Disher's 

 original tree at Garden Grove in order to grow seedlings for 

 instructional purposes. But there is general confusion as to the 

 true nature of the form and it has been distributed under mis- 

 leading names. In view of these facts it was deemed advisable 

 to record a name indicating its natural relationship preliminary 

 to the publication of this paper.- 



Now, if this form had been first described from specimens 

 collected in the wild, there is no doubt that it would have been 

 named a distinct species. Without endeavoring to solve the prob- 

 lem of its origin the botanist would have felt justified in thus 

 naming it by its absolutely distinct foliage alone. But we do not 

 know that it could long exist under wild conditions and, as will 

 be shown later, the seedlings of the original trees do not come 

 uniformly true to type. Instead of so doing, usually some of 

 them resemble /. calif ornica. Hence, the writer feels justified in 

 calling it a variety of the species from which it has sprung, no 

 matter by what process. The following is a description of 

 Disher's original fertile tree already published' with two or 

 three minor changes based upon data in the possession of the 

 writer. 



NEW VARIETY 

 JUGLANS CALIFORNICA var. QUERCINA Babcock 



Tree 20 ft. or more high. Bark aromatic and strongly walnut- 

 scented. Branchlets hollow, chambered with pithy plates. Twigs, bud- 

 scales, and young leaves granular-pubescent. Buds few-scaled, axillary 

 or superposed. Leaves 1 to 3 inches long, alternate, exstipulate, mostly 

 compound with three leaflets; terminal leaflet two or three times as 

 long as lateral leaflets and ranging from I/2 to 2 inches in length, in 

 form varying from broadly ovate through oval to elliptical or oblong, 

 truncate or emarginate at the apex, margin serrate or almost entire; 

 lateral leaflets placed opposite or scattered, with petiolules or sessile, 

 sometimes one or both lacking; petiole equal to, shorter or longer than, 

 the terminal leaflet. Plant monoecious, occasionally with hermaphrodite 



^Babcock, 'A New Variety of Juglam calif ornica Wats." Science, 

 n. s., XXXVIII, 968, p. 89. 



3 Babcock, Mem. Univ. Calif. II (1910), p. 54. 



