PO ae) On, poy? ae 
3. A DWARF STOCK FOR THE PLUM 
The sand cherry Prunus Besscyi makes a gooc stock for the hybrid plums cf low 
growth such as Opate and Sapa, but for tall growing trees there is some dancer fron 
lopping over of the trees as they come into bearing. 
Perhaps the seec’ings of the Western South Dakota plum as represented by Oacoma 
may serve a good purpose as o dwarf stock. Seedlings, one year old, 100 for $3.00. 
4. A STANDARD STOCK FOR THE MANCHU APRICOT 
The Manchu apricots (see Bul, 309) brought by Dr, N,.E. Hansen from North China 
(Manchuria) are good annual bearers equal in quality to the market apricots but 
smaller in size, The Manchu apricots are of strong growth, over twice that of ;}lums 
and ripen ahead of plums, Coming from 50 ceree below ,ero (Fahrenheit) are harcy 
ip into Canado, 
Seeclings of the Manchu apricots will endure 50 degrees below gero Fehrenheit 
and may be expected to be the ultimate stock for the North, One of the seedling 
Manchu apricots bore six bushels of fruit in one season, 
The netive plum (Prunus Americana) was the only stock availeble at first, but 
the apricot tends to cvergrew the plum root and to break off at the point of union, 
It helps to stake such trees to ease the strain, 
One-year seedlings of Manchu apricot, 4 for 41.00. 
5, A NONE=SUCKERING STOCK FOR SELECT CHOKECHERRIES 
Native chokecherries of good quality free from "choke" ere in existence. They 
need only tc be collected, Two such selections are noted in Bul. 224, Better ones 
have appcared since that time, and in due time will come into cultivation, The main 
difficulty is the strong roct-suckering habit which is decidedly objectionable, The 
best stock for budding is the May Day tree (Prunus Padus commutata) from East Siberia, 
The chokecherries on this stock make a strong 5 to 6 foot growth the first year, The 
May Day is free from root-suckering, 
Seme May Day trees shculd be planted by nurserymen tc provide stocks for future 
use. One-year seedlings to line out for budding, 5.for $1.00, 
FOUR PRIMITIVE SPECIES OF THE PEAR 
The pear is not a native of America. The species of interest to us are from 
Europe and Asica, especially Siberia and North China. The following four specics 
are offered as one and two-year-old seedlings, and are interesting espeeially as 
ornamental trees and for breeding winter-hardy pears resistant or immune to the dese 
sructive bacterial discase known as fire-blight. (See S, D, Bul. 224). 
1. Harbin Pear (Pyrus Ussuriensis). The hardy winter pear collected in the 
Harbin region, North China, by Dr. N. EH. Hansen 1924, One-year seedlings, 
two, for $1.00. 
2. Russian Sand Pear, This is Pyrus Sinensis (R. & K. 453) received from Russia 
has borne abundant fruit for many years, Fruit medium in size, anc food for. 
culinary use, also for cating when fully ripe. One-year seeclings, two's ©" 
foe i00, 
3. Saponsky Ussuriensis Pear. Saponsky Ussuriensis pear, native of Soponsky, 
east Siberia, (See S, D. Bul, 224). Very hardy and free from fire-blight. 
Leaves nearly round, Valuable for hybridizing and as ornamental trees, 
Two-year Old seedlings, two fer $1.00, 
4, Pyrus Ovoidea Pear, This North Chinese pear has borne fruit many years at 
this station. (See S. D. Bul, 224). Originally for the Arnold Arbcretum 
-as Pyrus Simonii, The bright scarlet leaves in autumn are attractive. 
Fruit a small pear, one and 5/8 inches in diameter, sweet, juicy and of 
fair quelity. Not quite as hardy as the Harbin anc Saponsky (Pyrus Ussue- 
iensis) pears. Two-year seedlings of Pyrus cvoidea, two for $1.00. 
