22 Wyoming Experiment Station. 



its flowers terminally and having weak purple prickles. The 

 leaflets are nine or eleven (occasionally seven) in number and 

 about an inch long. This rose occurs in the prairie region of 

 the eastern part of the state, where it often becomes a trouble- 

 some weed in cultivated fields. 



Wyoming Rose (Rosa grosseserrata Elias Nelson). 



A bushy, much-branched rose, several feet high, usually oc- 

 curring on river banks. Its leaves are composed of five or 

 seven leaflets, about an inch or an inch and a half long. The 

 prickles are very few but stronger than in the two preceding. 



Woods' Rose (Rosa Woodsii Lindl.) 



The common rose of the rocky slopes and ravines in the hills. 

 It is from a few inches to two or three feet high and has green, 

 shining foliage and much smaller flowers than the prickly rose. 

 The leaflets are from five to seven and about three-quarters of 

 an inch long. The stems are usually beset with stoutish prick- 

 les, but may sometimes be found entirely unarmed. 



Fendler's Rose (Rosa Fendleri Crepin). 



The common rose growing along streams. It may be known 

 by the dull-greenish color of its foliage and the very small 

 leaflets, which are only about half an inch long and usually 

 seven in number. It is several feet high and of a bushy habit 

 of growth. This rose and the preceding are the ones generally 

 seen in town lots. 



APPLE FAMILY. 

 (Pomaceae). 



This family embraces various trees and shrubs having apple- 

 like fruits or pomes. To it belong such valuable fruits as the 

 apple, pear, and quince. Our hawthorns and the service-berry 

 are also members of the apple family. 



American Mountain Ash (Sorbus sambucifolia (C. & S.) 

 Roem.) 



