1913] Babcock: New Form of Juglans 19 



second-growth lateral branchlets on trees bearing abnormal 

 flowers, and leaves associated with abnormal catkins are shown 

 in plate 9, figure 14. Some of these leaves resemble somewhat 

 the typical leaves of the new form and, at the same time the leaves 

 shown here were collected, one second-growth lateral branehlet 

 was found that bore a leaf very similar to the typical leaf of the 

 new form (cf. plate 10, figure 15, a). 



We may now summarize the phenomena observed in connec- 

 tion with the occurrence o-f teratology in Juglans calif ornica and 

 add some considerations with respect to the possible origin of the 

 new variety. Abnormal flowers, fruits and leaves are of frequent 

 occurrence on indigenous trees. They usually occur later in the 

 growing season than the normal blooming period, on secondary. 

 lateral branchlets, or in the case of abnormal catkins, sometimes 

 as secondary catkins terminating the first growth of the season. 

 The fruits produced by abnormal flowers retain the characters of 

 asymmetry and irregularity of surface. Their average size is 

 only about half that of normal fruits. 



Only a small percentage of the abnormal fruits collected by 

 the writer contained viable seeds. Among all the seedlings which 

 have been grown from abnormal nuts, not one shows a trace of 

 the leaf characters of the new form. On the other hand, in con- 

 nection with the fourth recurrence of the new form at Garden 

 Grove in the spring of 1911, the writer was able to ascertain 

 definitely that some of the seedlings of the new form grew from 

 nuts of normal size and shape. These facts indicate that the new 

 form does not originate from teratological fruits. However, we 

 must concede the possibility of the original trees having so 

 originated. More of these abnormal nuts should be collected and 

 the seeds tested. 



The rea.sons for thinking that the new variety may have orig- 

 inated from teratological fruits may be concisely stated as fol- 

 lows : 



1. There is more or less similarity between the abnormal 

 leaves, found on secondarj^ branchlets or associated with abnor- 

 mal catkins, and the leaves of the new form. 



2. Abnormal flowers and fruits are frequently found during 

 the normal blooming period on some of the original trees of the 



