The Shrubs of Wyoming. 39 



three very narrow lobes. Common on bleak slopes and ridges 

 in the lower mountains. 



Hoary Sage-brush (Artemisia cana Pursh). 



A common shrub in clayey soil on the plains. It is one or 

 two feet high and has narrow entire leaves which are silvery- 

 hoarv or greenish in color and an inch or two long. 



RABBIT-BUSH. 



( Chrysothamnus )v 



The rabbit-bushes are characteristic low shrubs or under- 

 shrubs of our open plains. They are often improper!} called 

 sage-brush, but as they lack the well-known scent of the sage- 

 brush they need not be confused with them. The rabbit-bushes 

 all have narrow leaves and yellow flowers produced in great 

 abundance at the ends of the stems, literally covering the bushes 

 or clumps during August and earlv September. On account of 

 the large masses of yellow flowers some of them may be used 

 to advantage for bedding purposes. The ornamental rabbit- 

 bush (Chrysothamnus pulcherrimus} is especially handsome, 

 producing a wealth of yellow flowers equaled by no other native 

 shrub. The foothill rabbit-bush is also a desirable species. 



There is a great variety of these undershrubs in the state. 

 The more shrubby ones are given below. Most of them have 

 more or less hoary leaves and greenish-yellow or yellow branch- 

 es, which are usually very minutely woolly under a magnifying 

 glass. The first three, however, have smooth whitish stems 

 and very green leaves. 



Green Rabbit-bush (Chrysothamnus pumilus Nutt.) 



Very low and seldom over a foot high. The abundant flow- 

 ers are crowded into rounded clusters at the ends of the branch- 

 es, and its leaves are green and very narrow. A common spe- 

 cies on the plains. 



Foothill Rabbit-bush (Chrysothamnus glaucus Aven Nelson). 

 Similar to the preceding, but larger in every way, one to 



