WEEDS OP THE MORNING-GLORY FAMILY. 



109 



Capsule globose, 2-4 valved. Seeds dark without hairs, J inch across. 

 (Fig. 74.) 



Very common in cultivated bottom lands, moist uplands and 

 along gravelly banks. June-Aug. It spreads by both seeds and 



creeping underground stems and 

 is often called wild morning-glory 

 or pea vine. From the annual 

 morning-glories above mentioned 

 this and the next are told by the 

 flowers having two slender stig- 

 mas, whereas in them the 1 or 2 

 stigmas are globose or enlarged at 

 tip. The bindweed often climbs up 

 the stalks of corn or wheat and 

 pulls them over, while potatoes and 

 other low growing crops are liter- 

 ally smothered by its vines and 

 leaves. Its rootstocks bear numer- 

 ous buds and if cut up any small 

 piece with a bud present will pro- 

 duce a new plant, Three remedies 

 are given for its eradication 



Fig. 74. (After Cox.) J Q ft recent bulletillj * yiz ^ ( fl ) 



Thorough cultivation every week or ten days between the spring 

 and fall frosts, cutting out every piece of top growth that shows 

 itself. (?>) Pasturing with hogs which are very fond of the roots 

 and rootstocks; the hogs of course should not have their noses 

 ringed or slit, so that they may root deeply ; if turned in just after 

 the land is plowed the roots will be near the top and the hogs, if 

 not furnished much other food, will go after them greedily, (c) 

 Sowing the land to alfalfa, which not only tends to smother out 

 the weed 1m t by its necessary frequent cutting for hay serves in 

 keeping down the top growth. The alfalfa should lie followed by a 

 cultivated crop to complete the work of eradication. 



7'>. CONVOLVULUS ARVENSIS L. Field Bindweed. Corn-bind. (P. I. 1.) 



Resembles the preceding but the branches shorter, 1-3 feet long ; 

 the leaves smaller with the lobes at base more pointed and projecting. 

 Flowers less than 1 inch in length, white or tinged with red; calyx with- 

 out bracts at its bas<\ (Fig. 75.) 



In Indiana this introduced bindweed is much less common than 

 the native species and occurs in dry, usually sandy or gravelly 



*H. R. Cox Farm Bull. 368, U. S. Dept. Agr. 



