DESCRIPTIVE MANUAL 



245. 



Fig. 141-A. Distribution of Annual Morning-glory. 



The I. purpurea has heart-shaped leaves with retrorsely hairy- 

 stem j peduncles long, umbellately 3-5 flowered, purple to white. 



Distribution. — Common in waste and cultivated grounds from 

 New England southwestward ; abundant from Missouri southward ; 

 native from tropical America ; rare in Iowa. The I. purpurea is- 

 commonly cultivated and is a frequent escape from cultivation in 

 Hardin, Story, Marshall, Wapello and Marion counties. 



Extermination. — It is an annual and is easily destroyed; how- 

 ever, the seeds retain their vitality for some time, frequently 

 springing up for several seasons after the most thorough cultiva- 

 tion. 



Hedge Bindweed or Morning-glory {Convolvulus sepium L.). 



Description. — Smooth, occasionally, however, pubescent, twining 

 around supports or trailing; leaves triangular, halberd or arrow 

 shaped, the tip acute, or pointed, the basal lobes obliquely trun- 

 cate or sinuate lobed ; flowering peduncles 4-angled with 2 leaf -like 

 bracts which are commonly acute; corolla white or tinged with 

 rose purple. 



Distribution. — Hedge bindweed or morning-glory is common in 

 the northern states and in the southwest from Texas to Canada, 

 also in the Great Basin country. A form of it is also found in 

 Europe and Asia. Common in every section of Iowa not only in 

 corn fields, but along highways and in small-grain fields. 



