﻿46 coNYOLVULACEiE (Baker & Wright). 



I. IPOMCEA, Linn. 

 Sepals 5, very various in shape and texture, free to the base, 

 equal or unequal. Corolla broadly funnel-shaped or campanulate, 

 rarely hypocrateriform ; lobes very short. Stamens 5, inserted low 

 down in the corolla-tube. Ovary usually 4-ovuled and 2-celled or 

 more or lesg distinctly 4-celled, rarely 3-eelled and 6-ovuled ; style 

 filiform ; stigma with 2 capitate subglobose lobes. Fruit capsular. 

 Seeds hairy or glabrous. 



Twining or erect herbs or undershrubs ; leaves very varimis in shape ; flowers 

 solitary or cymose, usually larger and more showy than in Convolvulus. 



DiSTEiB. Species about 400, cosmopolitan in the tropical and warm temperate 

 zones. 



Section 1. Oethipomcea. Stem erect, ascending or prostrate, but neither 

 twining nor producing adventitious roots. 

 Leaves narrow or with narrow lobes : 

 Leaves glabrous : 



Leaves entire, tapering towards the base (1) simplex. 

 Leaves entire, broad at the base ... (2) praetermisaa. 



Leaves divided , ... (3) angustisecta. 



Leaves pilose (4) (Eaotherse. 



Leaves pubescent beneath : 

 Corolla 2 in. long : 



Peduncle 1 in. or more long ... (5) argyreioidca. 



Peduncle 4 Hn. long ... ... (6) Tobertsiana. 



Corolla less than 1 in. long (7) Barrettii. 



Leaves spathalate-cuneate, bilobed ... ... (8) mesenterioides. 



Leaves ovate or oblong, not less than i lln. 

 wide : 

 Leaves pubescent : 



Corolla narrowly funnel-shaped, 3-4 in. 



long: (9) adenioides. 



Corolla campanulate, 2 in. long ... ... (10) suffraticosa. 



Leaves pilose : 



Leaves green on both surfaces, sessile ... (11) GreenBtockii. 

 Leaves white beneath, shortly petioled (12) chloroneura. 



Section 2. EepipoM(Ea. Stem prostrate and rooting, not twining. 



Flowers solitary, white (13) carnosa. 



Flowers cymose, purple (14) biloba. 



Section 3. Stkophipomcea. Stems twining, at least at their ends. 

 * Leaves entire : 



Inflorescence subcapitate, surrounded by 



an involucre of connate bracts (15) pileata. 



Inflorescence a capitate or umbellate 3- 

 or more flowered cyme ; bracts not con- 

 nate : 



Sepals more than 6 lin. long, ovate- 

 acuminate ; 

 Leaves ovate, 2-3 in. long ... (16) Atherstofiei. 



Leaves lanceolate, 8-10 in. long ... (17) Ommanei. 

 Sepals more than 6 lin. long, linear ... ^18) ovata. 

 Sepals less than 6 lin. long, lanceo- 



T a ^^'^ ■". (J9) gerrardiana. 



Inflorescence 1- (rarely 2-) flowered; bracts 

 not connate 



Leaves linear and hastate or auricled 

 at the base (20) angustifolia. 



