lissima_.]

Summary

The chief difficulty encountered in transplanting several nut tree and
other commonly tap-rooted seedlings is thought to be due to the lack of
a branched root system. The methods and results of a fairly simple
technique of inducing fibrous roots, that of growing seedlings in
vermiculite, have been presented.

FOOTNOTES:

[Footnote 21: First Assistant in Plant Breeding, University of Illinois,
Department of Horticulture.]

[Footnote 22: Formerly Half-time Assistant in Plant Breeding, University
of Illinois, Department of Horticulture.]

Eastern Black Walnut Survey, 1951

H. F. STOKE, _Roanoke, Va._

The Northern Nut Growers Association, at its 1950 Annual Meeting,
adopted a resolution directing that a survey covering the eastern
American black walnut, _Juglans nigra_ be conducted during the ensuing
year, and that the services of the State and regional Vice-presidents be
utilized in making the survey.

In carrying out this mandate fifty questionaires were sent out, and 37
replies were received. Of these, 33 were from the States, including the
District of Columbia, three were from Canada, including British
Columbia, Ontario and Prince Edward Island, respectively, and one was
from Belgium.

From these replies, as compiled, it is apparent that the natural range
of the American black walnut may be defined approximately as follows:

Beginning at the Atlantic seaboard at Massachusetts Bay curving slightly
northward then westward across northeastern New York to Toronto and on
westward across lower Ontario, Lake Huron, Michigan, Wisconsin and
Minnesota, in which state the line curves south-westward, crossing about
the northwest corner of Iowa. From this point the line runs
approximately south across the eastern parts of Nebraska, Kansas,
Oklahoma and Texas. As the line approaches the Gulf of Mexico it turns
eastward, crossing the southern parts of Louisiana, Mississippi, Alabama
and Georgia, back again to the Atlantic.

The natural range of the black walnut may be said to have been limited
on the north by winter cold, on the west by lack of sufficient rainfall
and on the south by a winter climate too mild for the required dormant
rest period. Where these limitations are removed the American black
walnut appears to do well far out of its natural range.

In its native state it seemed to thrive best along water-ways and in
hollows among the hills and mountains, though it was also to be