1913] BabcocTc: New Form of Juglans 5 



seldom found to be divided into nearly equal parts by a deep 

 suture but there are sometimes outer indications of tripartite 

 inner structure. Such marks are shown in plate 4, figure 6, I. The 

 occurrence of tricotyly is frequent but many tripartite nuts con- 

 tain no embryos. Such a nut containing an embryo is shown in 

 plate 4, figure 6, k. In dicotyledonous nuts from this tree the 

 cotyledons are reduced, sometimes so much so as to be barely 

 distinguishable (cf. plate 4, figures g, h, i, j). 



Recurrence of the New Form 



In the autumn of 1907, when the writer first visited Garden 

 Grove to examine the original trees, he was shown about a dozen 

 two-year-old seedlings, all of which closely resembled the original 

 trees. These were found scattered through the nursery of about 

 nine thousand budded English walnut trees. The seedling roots 

 were grown from nuts collected in the autumn of 1904, partly 

 from wild trees in Brea Cafion and partly from a row of Juglmis 

 calif ornica trees growing in Garden Grove. The seeds had been 

 mixed so that there was no way of locating the tree or trees 

 that gave rise to the new form. Mr. Disher's interest in the 

 unusual appearance of these seedlings again prompted him to 

 leave them unharmed, so that the writer was able to secure a 

 fairly good photograph of one that stood at the end of a row 

 (cf. plate 5, figure 7). The contrast between this little tree and 

 its luxuriant neighbors was certainly striking. The slender 

 branches and ovate leaflets are distinctive. Some leaves are so 

 placed that the large terminal leaflet and two small lateral leaflets 

 are clearly shown. One of the seedlings differed from all the rest 

 in having two pairs of lateral leaflets. Nearly all the leaves on 

 the tree were of this type (cf. plate 5, figure 8). Since that time 

 the writer has seen similar leaves on other seedlings, most of 

 whose leaves were three-parted, as well as leaves intermediate 

 between the two. In fact, the great amount of variation in the 

 leaves of the several individuals which we class as the "new 

 form" is one of the most interesting things connected with it 

 (cf. plates 2, 3, 5, and 11). 



In 1909 William Tyler, son-in-law of Mr. Disher, reported to 

 the writer that he had found a few specimens of the aberrant 



