166 UNIVERSITY OF CALIFORNIA EXPERIMENT STATION. 



There are other hybrid trees of spontaneous origin in the central and 

 northern part of the State which are fully equal in every way to the 

 Burbank type. These are too numerous for individual description. A 

 particularly fine one is the Pleasants tree which stands close to the 

 bridge on the county road near the old Pleasants ranch, between Vaca- 

 ville and Winters. This is one of the most beautiful walnut trees in 

 the State. 



Juglans nigra crosses just as freely with the southern California black 

 walnut or perhaps even to a greater extent than it does with the north- 

 ern type, although this seems unusual since the blooming periods of the 

 two species are several months apart. The most notable examples of 

 southern California Royals are the El Molino or Oak Knoll trees, situ- 

 ated on the old Kewen or Mayberry ranch, now the property of Mr. 

 H. E. Huntington and his son Howard Huntington, situated southeast 

 of Pasadena in the Oak Knoll district. This place is well known on 

 account of having upon it a picturesque old Spanish mill built by the 

 Mission Fathers, from which the name El Molino is derived. In its 

 original condition this place had two double rows of large black walnut 

 trees, one extending on either side of a drive from the home site toward 

 the south, to what is now Huntington Drive, and the other extending 

 east and west to the west of the home site and the old mill, near the 

 present residence of Mr. Howard Huntington. In going to Pasadena 

 on the El Molino electric car line the first mentioned group of trees is 

 situated a few rods to the east of the point where the El Molino line 

 leaves Huntington Drive and turns in toward Oak Knoll and the Went- 

 worth Hotel. The second group is found just to the east of the car 

 line at the point where it starts up the hill below the Wentworth Hotel. 

 Quite a number of other trees of apparently the same origin and gen- 

 eration as these may be found scattered here and there in dooryards 

 and by roadsides through Pasadena, Alhambra, San Gabriel, El Monte, 

 Covina and other neighboring localities. These trees are all of the same 

 general type, being large, erect, with clean trunks and rather rough bark 

 and having a general resemblance to Juglans nigra. It is evident, how- 

 ever, that none of them are entirely typical of that species. The nuts 

 are all much smaller and smoother and quite different from the nigra 

 type, all the trees come out much earlier in the spring and hold their 

 foliage much later in the fall than typical nigra and they are all of 

 much more rapid growth than nigra. 



There stands on the Graves place, near the El Molino trees, a group of 

 real nigra, planted from eastern nuts, and the difference is most pro- 

 nounced between the trees in the two places. Mr. H. H. Mayberry, 

 whose father was one of the early owners of the El Molino ranch, writes 

 as follows concerning these trees : "There formerly stood in front of the 



