CHAP. I.] CONVOLVULACEiE. 407 



consists of five sharply-pointed hairy lobes, con- 

 nected by a very fine membrane. The flowers 

 are surrounded by a great number of sharply- 

 pointed bracts. Similar bracts are very con- 

 spicuous in the genus Collomia. Gilia and 

 Ipomopsis, so well known for their splendid 

 flowers, also belong to this order. 



ORDER CXXXV HYDROLEACEiE. 



Elegant little plants, distinguished from the 

 preceding order by the flowers having two 

 styles, and a two-valved capsule. E-etziaceae, 

 an order containing only one Cape plant, is 

 inserted here by some botanists, who have 

 separated it from Convolvulacese. 



ORDER CXXXVI.— CONYOLYULACEiE. 



The principal genera are Convolvulus, Ipomo&a 

 and their allies. The genus Convolvulus formerly 

 included all the beautiful monopetalous flowers 

 with a folded limb, which are so common in gar- 

 dens, but it is now restricted to those which 

 have a two-celled capsule, with the cells two- 

 seeded ; the stamens are inclosed in the corolla, 

 and the stigma is divided into two narrow 

 thread-like lobes. Ipomoea only differs in lia,ving 

 the lobes of the stigma capitate. In Quamoclit, 



