1252 
NOTES ON BEHAVIOR OF PREVIOUS INTRODUCTIONS. 
Rev. Jno. B. katzner, of Collegevllle, Minnesota, 
In letter dated December 10, 1917, reports: "All trees 
and plants to succeed in Minnesota must be able to 
stand a cold of from 35 to 40 degrees below zero. The 
many varieties of pears from northern China and Man- 
churia I received from the United States Department 
of Agriculture could not endure that cold. Yet 2 va- 
rieties of pears, Nos. 21880 {Pyrus ussuriensis) and 21982 
(Pyrus betulae folia) , after freezing back from 3 to 4 
winters became perfectly hardy and have not lost a 
bud since, and grafts made from them are just as 
hardy. These trees are now 7 feet high and may bear 
next season. I regret not to have kept the other va- 
rieties that long on trial. Maybe some more would 
have been found hardy in that time. But what is the 
cause of these 2 varieties becoming hardy after freez- 
ing down to the ground for several years? It may 
sound somewhat heterodox in horticulture, but I look 
at it this way: These varieties of pears along with 
some others coming from northern China and Manchuria, 
would have been hardy originally in Minnesota if they 
had been propagated directly in our State, but having 
been grown for several years in the mild, congenial 
climate of California, these pears have naturally lost 
much of their original hardiness." 
Notes from Correspondent* abroad. 
Mr. Barbour Lathrop, writes in a recent letter: 
"The second lot of seed, Cryptotaenia japonica (Anglicized 
by the Yokohama Nursery Company to 'Japanese Celery' 
and known in Japan as 'Mitsuba') produces a vegetable 
that pleased my palate on the two occasions on which 
1 tried it. It is very popular In Japan, its consump- 
tion coming next after rice and soy beans. As a crop 
It Is very profitable. Enclosed is an article by the 
Nursery Company on the methods of its planting and 
eating. Those people say it, (Mitsuba), has not been 
introduced into America or any 'Western Country' -and 
even if it shouldn't prove a success, experiments 
with it would certainly be interesting and possibly 
our people may take to it quicker than they have to 
•Udo' ." 
