THE ROSE FAMILY 103 



THE ORPINE FAMILY (Craxsulaceae). 



Succulent herbs with flowers having as many or twice as 

 many pistils as calyx and corolla divisions, usually borne in 

 cymes. Leaves stalkless, generally fleshy. Plants of this 

 family are also commonly called Stonecrop. 



Live-for-ever (Sedwn purpureum Tausch) is a cultivated 

 plant with thick stems about 2 feet high and fleshy oval stalkless 

 leaves. When occurring as a weed it is difficult to suppress. It 

 spreads principally from the root, but parts of the stems dis- 

 tributed by the plow or cultivator will root and rapidly develop 

 into vigorous plants. Where well established, it excludes other 

 cultivated plants. 



When under cultivation it should be closely guarded. 

 Occasional plants may be destroyed by the application of 

 salt about the stems in dry hot weather. Where well estab- 

 lished, the land should be given over to bare fallow with frequent 

 cultivation of a kind that will unearth the underground vegeta- 

 tion, so that it can be burnt or otherwise destroyed. 



THE ROSE FAMILY (Rosaceae). 



The Rose family is more remarkable for ornamental and 

 fruit bearing plants than for agricultural pests. It is extensive 

 and contains plants with regular flowers and alternate leaves, 

 generally having appendages on each side of the footstalk, by 

 which their relationship is shown. They present great 

 diversity in their fruit which may be papery and pocket-like as 

 in the meadowsweets, fleshy and urn-like as in the roses, 

 succulently fleshy as in the raspberry and strawberry, or hard 

 and dry as in the cinquefoils. 



To this family belong the most troublesome Prairie Roses 

 (Rosa pratincola Greene or Rosa arkansana of Canadian writers, 



