138 Convolvulus (Convolvulacece). [No. 18 



Leaves, two to four inches in length, more or less arrow- 

 shaped. Apex, pointed. Base, lobed, the lobes 

 often cut obliquely, and sometimes slightly toothed 

 or wavy. 



Fruit, one-celled or imperfectly two-celled, four-seeded. 



Found, in rich moist ground from North Carolina north- 

 ward and westward. 



An extensively twining or sometimes prostrate vine, five 

 to eight feet in length, smooth, or sometimes varying to 

 downy. 



In parts of England the blossom of the Bindweed is 

 named Old Man's Night-Cap, as that of the White Cam- 

 pion is named Grandmother's .Night-Cap. 



Fig. 67. — Field Convolvulus. [C. arvinsis, Z.] 



This species differs chiefly in the following items : 



Flowers, three quarters inch in length. Bracts, minute, 

 pointed near the middle of the flower-stem. 



Leaves, variable, the lobes at the base pointed. Stem, 

 slightly hairy, several feet in length. 



Fruit, two-celled. 



Found, not common, escaped, in old fields from North 

 Carolina to Maine. 



The Field Convolvulus " has taken possession of many 

 of our old fields, where it proves troublesome to farmers." 

 — Torrey. 



