134 Convolvulus (Convo^dacece). [No. is 



Resembling Fig. 63. Wild Potato-Vine. Man-of-the-Earth. 



/. pandurata, Meyer. 



Flowers, about three inches in length ; white, with the 

 tube purple within ; broad funnel-shape. Corolla, 

 three or four times longer than the calyx. Sepals, 

 smooth, egg-shape to oblong, very blunt, the two 

 outer ones shortest. Stamens and style, not exserted. 

 Stigma, two-lobed or entire, somewhat globose. 

 Cluster-stem, with one to five blossoms. June to 

 August. 



Leaves, two to three inches in length, heart-shape, usually 

 pointed at the apex, entire, or sometimes contracted 

 at the sides to lobed and fiddle-shape. 



Fruit, two-celled. Seeds, four, woolly on the angles. 



Found) oftenest in dry ground, from Connecticut to- 

 Michigan and southward to Florida and Texas. 



A twining or sometimes trailing herbaceous vine, with 

 stems four to eight feet in length ; several stems usually 

 springing from one huge tuberous and woody root that 

 often weighs from ten to twenty pounds. 



" This root has long been employed in domestic 

 medicine, and is a favorite remedy of some botanic doctors. 

 It is bitterish and somewhat astringent." TORREY. 



Resembling Fig. 65. White Star-Ipomcea. I. lacunbsa, L. 



Flowers, about one inch in length, or less, bell-shape. 

 Corolla, white, sometimes with a purplish edge, 

 sharply five-lobed, about twice the length of the 

 calyx. Sepals, lance-shape to oblong, pointed, hairy. 

 Stamens and style, not exserted. Stigma, two-lobed 

 or entire. Cluster-stem, much shorter than the leaf- 

 stem, usually about one half as long, with one to three 

 blossoms. August, September. 



