WILLOW FAMILY 



bind down the moving sand is very great ; for the pro- 

 tection of valuable property from the encroachment of 

 shifting dunes is becoming an important problem in 

 many parts of our country. The regions most affected 

 are the Atlantic and Pacific coasts, the lake district of 

 Michigan, and the Columbia river district of Washing- 

 ton and Oregon. Very successful work in holding the 

 sand by grass and shrub planting has already been 

 done by the State of Massachusetts on a portion of 

 Cape Cod known as the Province Lands. 



BOG WILLOW 



Salix myrtilloides. 



Erect, slender, glabrous, twigs pale brown, attains the height 

 of one to three feet, found in bogs. Ranges from New Bruns- 

 wick and Quebec to British Columbia, south to New Jersey and 

 Iowa; also in northern Europe. 



Leaves. Alternate, simple, an inch to an inch and a halt 

 long, oblong, elliptic or somewhat obovate, mostly narrowed at 

 the base, entire, slightly revolute, obtuse or acute at the apex, 

 when full grown bright green above, pale or glaucous beneath. 

 Petioles short. 



Flowers. April, May. Catkins expanding with the leaves, 

 leafy-bracted at the base, rather dense. The staminate rather 

 less than an inch long ; the pistillate rather more. Fruiting 

 capsule oblong-conic, obtuse, glabrous, about one-fourth of an 

 inch long. 



PRAIRIE WILLOW 



Salix humilis. 



Upland grayish willow, three to eight feet high, varying much 

 in size and shape of leaves ; found on dry soil. Ranges from 

 Nova Scotia to Ontario, south to North Carolina and Tennessee, 

 and west to Nebraska. Hybridizes with Salix discolor. 



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