Early Growth of Trees. 165 
while those of opposite habit are said to be inde- 
terminate. It is, of course, apparent that plants of 
indeterminate growth are not hardy, as a rule. A 
series of careful measurements of growth was made 
upon various trees and shrubs at Lansing, Michigan, 
in 1886, and some of the records are presented be- 
low.* The last date in each case designates the ter- 
mination of growth for the year. It will be 
observed that very few of the plants grew until 
July. This faet is illustration and proof that in 
our rigorous climate cultivation should stop early, 
and that it should be vigorous at the opening of 
the season. 
RECORDS OF GROWTH.T 
Acer dasycarpum—May 12th, 1 in.; 16th, 2 in.; 25th, 4 in.; 
June 6th, 7 in.; 13th, 9 in.; 20th, 10 in.; 29th, 12 in. 
*Acer Pennsylvanicum—May 12th, 2 in.; 18th, 4 in.; 20th, 
5 in.; 26th, 7 in. 
Acer platanoides—May 12th, 3 in.; 16th, 4 in.; 20th, 5 in. 
acer Pseudo-Platanus—May 14th, 6 in.; 18th, 8 in.; 16th, 12 
in.; 30th, 13 in.; June 6th, 20 in.; 13ta, 23 in.; 20th, 24 in. 
Acer rubrum—May 26th, 5 in.; 30th, 6 in.; June 6th, 9 in.; 
13th, 10 in. 
* Bailey, Bull. 31, Mich. Agr. College, 73. 
tIn making the measurements recorded above, one average shoot was 
selected on each plant, and measured from time to time during the growing 
season. The drought may have checked growth to some degree, although it did 
not become severe until the end of June. Most of the plants stood upon the 
eampus, with no cultivation. A few were younger, and stood in the rows of a 
closely planted arboretum, where they received occasional cultivation, or 
in a newly-planted group, where the soil was frequently hoed; these plants 
are designated by asterisks. 
