10 5 
Many are the proTDlems that arise in connection 
with these pear questions. I'll touch upon a fev/. 
See here a few points. 
I probahly will get between 100 and 150 lbs. 
of clean seeds of Pyrus calleryana , but — a small 
percentage of P. betulaefolia will be mixed among 
this lot. 
Mr. Reimer says that we cannot sow it any 
thi&er than 10 lbs. p. acre, also this quantity of 
seeds means 10 to 15 acres of good land. 
Since there is P. betulaefolia among it, the 
field must be gone over by a man who knows the 
difference between the tv/o species and rogue out 
all P. betulaefolia and doubtful looking speci- 
mens. 
Prof. Reimer is willing to point out the 
differences betv;een the desirable and the un- 
desirable snecimens and he would prefer to have 
the place where these pears are being grov/n not 
too far away from Talent. Chico would be an ideal 
place in his opinion. This pear seed should under 
no consideration be distributed to various parties, 
since it is not all of one species. 
The rows between these pear seedlings can be 
?-l/? to 3 feet apart. 
Around here there are a few specimens that 
seem to be hybrids between P. calleryana and P. 
betula-efolia , but they are rare. 
Where ^. c alleryana occurs one also finds P. 
b etulaefolia and cultivated varieties of P. sero" - 
tina , P. calleryana and perhaps P. serrulata ; the 
chances for hybridization, therefore, seem very 
great. 
Prof. Reimer found P. calleryana in So. Japan 
and in So. and Central Korea where no other species 
of pears occur and he has arranged v/ith a repre- 
sentative of the Yokohama Nursery Co. to have seeds 
collected in these localities. 
Prof. Reimer has but little space available 
at his station and since I am giving him some seeds 
he does not desire any more from our Office. 
He collected but a few ounces of seeds of the 
wild P. ussuriensis , since the crop was a failure, 
not only at Ghing lung shan, but also in Manchuria. 
Prof. Reimer has followed my footsteps mainly 
while in search for pears here in China; he con- 
siders the Ya kwam li (SPI 177?4, l-77?5» and P1253) 
of extreme value as aa eating pear and for hybrid- 
ization v/ork. He is of the opinion that it is P. 
ussuriensis or if not pure ussuriensis, certainly 
for a very great percentage so. 
December 31, 1Q17. 
