CONVOLVULACEAE (CONVOLVULUS FAMILY) 321 
they are sometimes more than two feet long, and so thick as to 
attain a weight of over thirty pounds. Several stout, smooth 
stems spring from the same root, trailing or twining for a length 
of three to twelve feet. Leaves alternate, deep green, heart- 
shaped, long pointed, sometimes 
drawn in at the sides to a fiddle- 
shape, two to six inches long, 
with slender petioles often longer 
than the blades. Flowers like 
those of the morning glory, the 
corollas funnel-shaped, two to three 
inches long, white, with five pink- 
ish purple stripes, often several 
on one stalk, which lengthens very 
much as the seed ripens-; stamens 
five, inserted low down on the 
tube of the corolla and alternat- 
ing with its lobes; ovary two 
celled, with entire or two-lobed 
stigma. Capsules globular, two- 
celled, containing two to four 
seeds, which have fine wool all 
around the margins. (Fig. 223.) 
Means of control 
Except to satisfy hunger it would Fie. 223. — Wild ies Potato Vine 
not pay to dig for these deeply LOE PUES OS 
buried roots. Repeated deep cutting of the stems, putting a hand- 
ful of salt or a few spoonfuls of crude carbolic acid on the shorn 
surfaces, will finally subdue the weed. 
FIELD BINDWEED 
Convélvulus arvénsis, L. 
Other English names: European Bindweed, Small-flowered Morning- 
Glory, Cow-bind, Bell-bind. ; 
Introduced. Perennial. Propagates by seeds and by horizontal 
roots that. bud new plants. 
Y 
