13 6 Convolvulus (Convolvulacece). [No. 18 



Leaves, about two inches in length, heart-shaped to three- 

 lobed, pointed at the apex. 



Fruit, two-celled, four-seeded. 



Found, oftenest in low ground from Pennsylvania to Illi- 

 nois and southward to South Carolina and Texas. 



A twining or prostrate vine, herbaceous, slender, 

 smoothish, two to six feet in length. 



(2) Genus Conv6lvulus, Tourn. (Bindweeds.) 



From a Latin word meaning " to entwine/' 



Flowers, funnel-shape to bell-shape. Petals, united. 

 Bracts, present, covering the calyx, or minute on the 

 flower stem. Stamens, not exserted. Style, one, un- 

 divided or two-cleft at the apex. Stigmas, two, line- 

 like to egg-shape. 



Leaves, simple, alternate more or less arrow-shape. 



Fruit, round, two-celled, or one-celled by absorption of 

 the partition. Seeds, four. 



Twining or prostrate herbaceous vines. 



Fig. 66.— Hedge Bindweed. Rutland Beauty. C. sepium, L. 



Flozvers, white or rose-tinted. Corolla, one and a half to 

 two inches in length. Calyx, five-parted, with two 

 large leaf-like bracts entirely covering it, the bracts 

 heart-shaped at their base, and at their apex usually 

 pointed, sometimes varying to very blunt. Stamens, 

 widened and feathered toward the base, not exserted. 

 Flower-stem, four-angled, one-flowered, as long as the 

 leaf-stem, or longer. June, July. 



