CONVOLVULACEAE 



segments linear or lanceolate, the lateral about as long as the terminal one ; petioles 

 about as long as the basal lobes : peduncles usually 1-flowered : sepals glabrous, oblong 

 to suborbicular, 6-9 mm. long, obtuse or cuspidate : corolla purple, 5-6 cm. long ; tube 

 funnelform ; limb 6-7 cm. broad : capsules ovoid, 1-1.5 cm. long : seeds villous. [/. sagit- 

 tata Cav. ] 



In sandy soil, North Carolina to Florida and Texas. Spring to fall. 



7. Ipomoea trifida (H.B.K. ) G. Don. Perennial, pubescent, or glabrate. Stems twin- 

 ing or trailing, 4-20 dm. long : leaf -blades 2-6 cm. long, acuminate, the lower ones often 

 entire, upper 3-lobed, all cordate ; petioles as long as the blades or shorter : peduncles 

 3-10-flowered : sepals glabrous, 10-12 mm. long, oblong to lanceolate or ovate-lanceolate, 

 acuminate : corolla pink or lilac-purple, 2.5-3 cm. long ; tube funnelform ; limb 3-4 cm. 

 broad : capsules subglobose, 7-9 mm. in diameter, more or less pubescent near the top : 

 seeds smooth and glabrous. 



In valleys and light soil, Texas to Mexico and tropical America. 



8. Ipomoea Caroliniana Pursh. Annual, hirsute or glabrate. Stems trailing or 

 twining, 1-several m. long, often branching : leaf -blades ovate in outline, entire or deeply 

 3-lobed, cordate, the lobes acuminate or rarely obtuse ; petioles longer than the blades or 

 shorter: peduncles stout, 1-3-flowered : sepals hirsute, oblong or oblong-lanceolate, 9-12 

 mm. long, acute or acuminate : corolla pink or purple, 2.5-4 cm. long ; tube often whitish ; 

 limb 4-6 cm. broad : capsules subglobose, 7-8 mm. in diameter, more or less pubescent : 

 seeds glabrous. [/. commutata K. & S.] 



In sandy soil. South Carolina to Florida and Texas. 



9. Ipomoea lacunosa L. Annual, sparingly hirsute, or glabfttte. Stems twining, 

 5-25 dm. long, branching, rather slender : leaf-blades ovate, entire or 4-lobed, 2-7 cm. 

 long, deeply cordate ; petioles shorter than the blades : peduncles usually 1-3-flowered : 

 sepals nearly glabrous, oblong or ovate, 10-12 mm. long, acute or acuminate, ciliate : co- 

 rolla 1.5-2 cm. long ; tube white, funnelform ; limb often purple-margined, 1-1.5 cm. 

 broad : capsules subglobose, over 1 cm. in diameter, pilose : seeds glabrous. 



In fields and low grounds, Pennsylvania to Kansas, South Carolina and Texas. 



10. Ipomoea triloba L. Annual, more or less hirsute, or glabrate. Stems twining, 

 often high-climbing, branching : leaf-blades ovate, 4-10 cm. long, entire or hastately 3- 

 lobed, acuminate, glabrate ; petioles shorter than the blades : peduncles commonly sur- 

 passing the leaves : sepals pubescent, oblong or suborbicular, 8-10 mm. long, acute or 

 acuminate : corolla purple, 1.5 cm. long ; limb 1-1.5 cm. broad : capsules subglobose, 6- 

 8 mm. in diameter, often pubescent : seeds glabrous or nearly so. 



In sandy soil, peninsular Florida. 



11. Ipomoea cairica (L. ) House. Perennial, glabrous or nearly so, bright green. 

 Stem twining, more or less branched : leaf -blades suborbicular, 4-9 cm. in diameter, 5-7- 

 parted ; segments mainly elliptic-lanceolate, acute or acuminate, entire or the lower pair 

 lobed at the base ; petioles mostly shorter than the blades, glabrous : sepals glabrous, 4-8 

 mm. long, obtuse : corolla purplish, funnelform ; tube 3-4 cm. long ; limb 5-6.5 cm. broad : 

 capsules ovoid, 10-12 mm. long : seeds granular, finely pubescent. [/. palmata Forsk.] 



In waste places, Pensacola, Florida. Native of northern Africa. 



12. Ipomoea disse'cta (Jacq. ) Pursh. Perennial, villous-hirsute, or glabrate. Stems 

 twining, branching : leaf-blades suborbicular, 3-10 cm. in diameter, 5-7 -parted ; segments 

 oval to oblong or lanceolate, coarsely toothed or pinnatifid ; petioles as long as the blades 

 or longer, villous-hirsute : sepals glabrate, oblong to oblong-oval, 1-2.5 cm. long, or 3 cm. 

 long at maturity, obtuse : corolla white with purple throat ; tube funnelform, 2-3 cm. 

 long ; limb 3-5 cm. broad : capsules about 1.5 cm. long : seeds smooth and glabrous. 



In sand near the coast, Georgia and Florida to Texas. 



13. Ipomoea costellata Torr. Annual, more or less hirsute. Stems erect or diffusely 

 branched : leaves relatively few ; blades pedately 7-9-parted, the segments linear or spat- 

 ulate or some of them linear-filiform : peduncles filiform, longer than the leaves : sepals 

 ovate-lanceolate or oblong, acute, the outer ones with 1-3 crest-like keels : corolla rose- 

 purple, about 1 cm. long : capsules globular, about 5 mm. in diameter : seeds puberulent. 



In dry soil, southern Texas to Arizona and Mexico. 



14. Ipomoea fistulosa Mart. Perennial, shrubby, the young parts puberulent. Stems 

 several from a root, 1-2.5 m. tall: leaf-blades ovate, 5-9 cm. long, somewhat acuminate, 

 entire, cordate at the base, long-petioled : peduncles 4-12 cm. long, usually several- 

 flowered : sepals suborbicular or orbicular-ovate, 5-7.5 mm. long, the inner scarcely longer 

 than the outer : corolla light purple or rose-colored, 6-8 cm. long : capsules ovoid, about 

 1.5 mm. long : seeds shaggy pubescent. 



In waste places, Pensacola, Florida. Native of South America. 



