HORTICULTURAL EXPERIMENTS AT SAN ANTONIO. 28 
stocks indicate that patch budding and crown grafting are the most 
successful methods to be employed. Ring budding gives reasonably 
good results, but with this method more buds are lost after the 
union has been formed than is the case with patch budding. 
A large number of seedlings of the native black walnut (Juglans 
nigra) were grown by Mr. F. F. Collins, and several of these trees 
have been budded. With the exception of the first year, the winter 
of 1911-12, when the young growth was frozen back, a good growth 
has been obtained. A sufficient number are being grown at this 
time to demonstrate the value of this stock. 
Stone frwits.—Native plums are being used experimentally as 
stocks for stone fruits. The sorts commonly known as Tenehah 
Fic. 7.—Two rows of A mygdalus davidiana, a peach from China introduced by the Office of Foreign 
Seed and Plant Introduction, which is a very promising stock for stone fruits. These trees were set 
out in January, 1909. (Photographed September 16, 1913.) 
(Prunus munsonii), American (Prunus americana), and hog (Prunus 
rivularis) are included in this test. It is not expected that all of 
these species will be useful on a large scale, but the vigorous growth 
of the different species under very adverse conditions on the lime- 
stone hills about San Antonio proves their hardiness. 
A wild peach from China (Amygdalus davidiana, S. P. I. 21227), 
which bears a fruit. of no value, has proved to be unusually well 
adapted to San Antonio conditions. (See fig. 7.) So far it has 
proved to be resistant to beth chlorosis and root-rot. One orchard 
of about 30 trees, set in January, 1909, has survived without the 
loss by disease of a single tree. This species is being tested as a 
stock for peaches, plums, almonds, and apricots. The only serious 
drawback of this tree so far noted has been its failure to produce 
