253 



OiiDER LXXXIV. CONVOLVULACE^. 



Corolla 5-parted or cleft, persistent. Corolla funnel- or bell- 

 sliaped, the limb 5-plaited or 5-lobed, twisted in bud. Sta- 

 mens 5, alternate with the lobes of corolla ; filaments broad- 

 based; anthers 2-celled. An annular disk usually under the 

 ovary. Ovary either single, 2-4-celled, rarely 1-celled, or of 

 2-4 separate carpels ; ovules 1-2 in each cell or carpel. Style 

 simple or 2-fid, rarely 2-parted. Fruit capsular or indehiscent, 

 1-4-celled; cells 1-2-seeded. Seeds glabrous or hairy; em- 

 bryo (except in Cuscutece) with leafy, wrinkled cotyledons, in 

 mucilaginous albumen. — Stems herbaceous or ligneous, most 

 commonly climbing or trailing. Leaves alternate, entire or 

 lobed. Flowers large and handsome. 



Tribe 1. Convolvule^. Embryo with leafy cotyledons. Carpels united 

 in a solid ovary. Capsule dehiscent. (Gen. 1-8.) 



Style simple. 



Ovary 3-4-celled. 



Stigma capitate-2-lobed. Ovary 4-celled ... 1. Batatas. 

 Stigma capitate-granulated. Ovary 3 -celled . 2. PhaebitiS. 

 Ovary 2-celled. 



Sepals equal or subunequal. 



Stigma capitate, 2-lobed 3. Ipomcea. 



Stigmas 2, linear, revolute 4. Convolvulus. 



Sepals very unequal, imbricated in 2-3 rows, the 



2 outer lai'ge and decurrent 5. Aniseia. 



Ovary 1-celled (the young ovary sometimes half-2- 

 celled). 

 Two opposite bracts enclosing the calyx ... 6. Caltstegia. 

 No enclosing bracts. Sepals unequal .... 7. Shutereia. 

 Style 2-fid, or 2 separate styles. 



Styles 2, 2-fid. Leaves sessile, entire 8. Evolvulus. 



Tribe 2. DiCHONDREiE. Embryo with leafy cotyledons. Carpels 2-4» 

 separate. (Gen. 9-10.) 



Corolla 5-fid. Ovary 2-parted 9. Dichondra. 



Corolla crenate. Ovary 4-parted 10. Falkia. 



Tribe 3. Cuscute^. Embryo without evident cotyledons, worm-like. 

 Carpels united. Plants parasitical, leafless. 



Characters same as the tribe 11. Cuscuta. 



Tribe 1. Coi^'yolvule^. (Gren. 1-8.) 

 1. BATATAS, Eumph. 



Sepals 5. Corolla bell-shaped. Stamens included. Style 

 single ; stigma capitate, 2-lobed. Ovary 4-celled, or by abor- 

 tion 3-2-celled.— DC. :Prod. ix. />. 337. 



Trailing or twining herbs or half-woody plants, sometimes with large 



