The Shrubs of Wyoming. 



female catkins soon burst open and discharge the silky seeds. 

 Though several willows of the state attain the size of trees, 

 there is only one which is truly tree-like in its habit of growth. 

 This is the almond-leaf willow (Salix amygdaloides Anders.), 

 which may be known by its slender somewhat drooping branch- 

 es and long-pointed and finely-toothed leaves. It occurs on. 

 river bottoms at lower altitudes in the state. Besides the shrub- 

 by species noted below, two dwarf diminutive willows, only a 

 few inches high, are found on high mountain peaks. 



Western Black Willow (Salix lasiandra caudata (Nutt.) 



Sudw.) 



This is a very common willow on river banks in the state. 

 It is shrubby in its habit of growth, and often attains a large 

 size, having many trunks from the root. Its foliage is much 

 like that of the almond-leaf willow, but the twigs are not so 

 slender and the leaves on shorter and stouter stalks. 



Sandbar Willow (Salix fluviatilis Nutt.) 



This has a narrower leaf than any other willow in the state. 

 It is a low shrub, 2-12 feet high, frequenting the moist sandy 

 banks of streams. It has slender stems and branches, and a 

 very erect habit of growth. 

 Salix lutea Nutt. 



A very common willow several to ten feet high, widely dis- 

 tributed and occurring on most of the streams of the state. It 

 has oblong leaves, less than two inches long. At the base of 

 each leaf are two minute rounded leaves (stipules) which do 

 not always persist. 

 Nuttall's Willow (Salix Nuttallii Sarg.) 



A common willow on partially wooded slopes in the hills and 

 lower mountains. It may be known by its broad, blunt leaves, 

 which have entire margins, and are from 2 to 4 inches long. 

 As it grows in moderately dry situations, it is the first willow in 

 the spring to flower, the yellow catkins (the staminate ones) 

 appearing very early and long before the leaves. 



