2 BULLETIN No. 18. 



head. It is perfectly hardy as far as tried. The leaves are dark 

 green above and covered with a white pubescense on the under- 

 neath side. One of the valuable poplars on account of its not 

 shedding cotton. 



Lombardv poplar {Populus dilatata}. The first year after 

 planting it made a maximum growth of 3 ft. 2 in., and an average 

 growth of 2 ft. 5 in. The second year the maximum growth was 

 4 ft. 8 in., and the average 3 ft. 10 in. One of the six trees planted 

 died the first winter without any apparent cause; the other five 

 have not been injured in the least either of the two winters which 

 they have stood. The tree is tall and straight and makes a very 

 rapid growth; is of little value as a shade tree, but is used to a 

 considerable extent in street planting and to plant in belts for wind 

 breaks. In a cold climate it is a short-lived tree, and when it 

 begins to die is very unsightly. 



Carolina poplar {Populus monilfera). This is the common 

 " cottonwood " of the Eastern and Mississippi valley states. Is 

 perfectly hardy, and makes a good growth and a fine large tree, 

 but its chief value lies in the wood it furnishes; it is not a desirable 

 tree for lawns or street planting on account of its disagreeable 

 habit of shedding cotton at the time of ripening of the seeds. 

 Maximum growth the first year 2 ft. 6 in., average 2 ft. Maxi- 



;'m growth the second year 3 ft. 10 in.; average 2 ft. 6 in. 

 : Populus Petrovsky. This and the following variety were 

 very small trees when received, being only one year from cuttings. 

 Maximum growth the first year i ft. 4 in.; average i ft.; second 

 year the maximum growth was 3 ft. 3 in., and the average 2 ft. 

 7 in. This tree has a glossy green leaf and a spreading top, and 

 from all appearances will make a shapely ornamental or shade 

 tree. 



Populus argentea. This tree has large leaves, green on the 

 upper side and very white and downy on the under side; the leaf 

 has three well-defined lobes with two secondary lobes at the base ; 

 in shape it is similar to the hard maple leaves. The first year 

 after planting it made a maximum growth of 3 ft. and an average 

 of 2 ft. 6 in. ; the second year it made a maximum growth of 3 ft. 



3 in., and an average growth of 3 ft. Its growth is spreading like 

 the maples, and added to this the white downy appearance of the 



