CONVOLYULACEiE. 



199 



fine rose-colour, the tube slightly enlarged upwards, and 

 expanding into the broad spreading limb after flowering 

 the stem dies down to the roots. L Jalapa, the plant 

 which produces the medicinal substance known as Jalap, is 

 now called Exogonium purga, and differs from the present 

 genus in having the corolla tubular, and the stamens pro- 

 jecting from the opening; it is a lovely plant, and is nearly 

 hardy, bearing a cool greenhouse or frame; the stem is 

 climbing; the leaves heart-shaped, deeply lobed at the 

 base; the flower of a fine form, and shining purplish-red 

 hue. These plants require good soil. 



CONVOLVULUS. (Bindweed.) 



Gen. Char. (Pentandria Monogynia.) Flowers inferior, mono- 

 petalous, campanulate; stigmas two-cleft; capsules two-celled, 

 two-seeded. 



Named from convolvere, to entwine, one of the great 

 characteristics of this pretty genus, of which we have so 

 many hardy species in the garden ; for the greenhouse 

 there are C. multifidus and alceifolius, from the Cape; 

 lanatus, Cneorum, and tenuissimus, from the Levant ; flori- 

 dus, joannifolius, Canariensis, Masoni, from the Canaries ; 



