16 MONTANA EXPERIMENT STATION 



and making a vigorous growth each year. This is a hardy tree and 

 excellent for ornamental planting where only partial shade is de- 

 sired. It does not, however, make a tree large enough for street 

 planting. 



Cut-Leaved Weeping Birch : (Betula alba var. pendula 

 laeiniata) This variety differs from the European white birch in 

 having whiter bark and beautiful long drooping branches. It is 

 one of our most graceful trees and has probably contributed more 

 than any other to the beauty of the lawns in Montana towns and 

 cities. It is entirely hardy and grows fairly rapidly and is highly 

 ornamental at any season of the year. It is not intended for a 

 street tree, however, on account of its limited size and pendulous 

 branches. 



Yellow Birch: (Betula lutea) This tree sometimes grows 

 to 100 feet in height. The bark is light yellow in young trees. On 

 old trunks it becomes reddish brown. It is native in Newfoundland 

 and south to the Carolinas and Tennessee and west as far as Minne- 

 sota. 



In the spring of 1908, one hundred small plants were set out in 

 the experimental nursery. These killed back about one- third dur- 

 ing the winter of 1908-9. When they become acclimated they 

 promise to be entirely hardy and will be a valuable addition to the 

 list of ornamental plants. 



American White Birch: (Betula populifolia) This is a 

 small tree rarely growing higher than 40 feet. It has smooth white 

 bark. The leaves are slender and triangular. It is native from 

 New Brunswick to Delaware and west to Ontario and Montana. 

 It has been grown in the experimental nursery for five years and 

 is perfectly hardy, except that young plants occasionally suffer a little 

 winter injury the first season after transplanting. 



THE PEA TREE OR CARAGANA 



This genus includes several shrubs and small trees. The 

 leaves are deciduous and pinnate; the leaflets are small and entire; 

 flowers pea-like in form, usually yellow. 



Siberian Pea Tree : (Caragana arborescens) In 1904, twenty- 

 five plants 2 to 3 feet high were secured in Pennsylvania and 

 planted in the experimental nursery. They have been entirely 

 hardy and in 1907 were transplanted to the college campus. This 



