We have in Iowa two troublesome species of morning glory. One is native and is known as the wild morning glory or bindweed (Convolvulus sepium L.). The other, an introduced European species, is known by many common names, the principal of which are European bindweed, field bindweed, small morning glory and creeping Jennie (Convolvulus arvensis L.). This circular will discuss the European morning glory, which is becoming a serious pest in many states and especially in those west of the Mississippi River. It is reported as the worst perennial weed in Colorado, California and Kansas, and a serious pest in South Dakota, Idaho, Utah and Washington. It is generally distributed in Iowa but is particularly abundant and troublesome in the northwestern part. The European bindweed reduces crop yields, increases the labor costs, menaces the adjoining clean land and finally reduces land values. Every farmer should learn to recognize the European bindweed and eradicate it before it becomes established.