ORDER LXXXVI. OONVOLT PLACED. 445 



2. C. aquat'icus, ("Walt.) Stem tomentose. Leaves obloc^-ovate, on 

 short petioles ; peduncles generally 3-fiowered, sometimes as long as 

 the leaves. Corolla hairy. Capsule tomentose. — Rose-color. If. 

 Through the summer. Middle and lower Geo. 



Stylisma convolvuloides, Chois. 



3. C. spitham^e'us, (L.) Stem erect, branching, pubescent. Leaves 

 cordate or oval, pubescent. Flowers solitary, on axillary peduncles; 

 bracts longer than the calyx. — White. 2(. June — July. In dry 

 soils. 



4. C. obttjsilo'bus, (Mich.) Stem prostrate, glabrous, branching. 

 Leaves alternate, ainuate-lobed, nearly hastate, emarginate. Flowers 

 on peduncles, with 2 small leaves near the middle. Corolla large, with 

 a yellow tube and white limb. Style 2-cleft. — If. Aug. — Oct. On 

 the coast. Batatus litoralis, Chois. 



5. C. purpu'reus, (L.) Stem twining, hairy. Leaves cordate, entire ; 

 peduncles 1 — 3-flowered. Calyx hairy. Corolla funnel-shaped. — Blue, 

 purple, or white. 0. Through the summer. Introduced. 



Morning-glory 



6. C. Macrorhi'zus, (Ell.) Root very large, white, farinaceous, in- 

 sipid. Stem twining, pubescent, somewhat angled. Leaves cordate, 

 entire or lobed, pubescent underneath, the young leaves tomentose, 

 acute ; peduncles 1 — 5-fiowered. Calyx pubescent. Corolla with the 

 limb obscurely 10-lobed, pubescent on the outer surface. Stamens un- 

 equal. Style 2-cleft. Capsule 2 — 3-celled. Seeds hairy. — White, 

 tinged with purple. 2{. June — Oct. Is. of Car. and Geo. 



Batatus jalapa, Chois. 



7. C bata'tas, (L ) Stem creeping. Leaves very various, cordate 

 often variously angled and divided, usually with long petioles ; pe- 

 duncles 3 — 4-fiowered, equaling in length the petioles. Sepals usually 

 acuminate, mucronate. Corolla campanulate. — Various shades of pink 

 and purple. From the East Indies ; now cultivated in all warm coun- 

 tries for its valuable root. Sweet Potato. 



8. C. pandura'tus, (L.) Boot large. Stem terete, nearly glabrous 

 young branches pubescent. Leaves cordate, entire or 3-lobed, mucro- 

 nate, pubescent ; peduncles 1 — 5-fiowered, stipulate. Corolla with the 

 limb slightly lobed. Style simple. — White and purple. 2£. May — 

 Aug. In dry soils. Wild Potato-vine. Ipomcea punduratus, Mey 



9. C. sagittifo'lius, (Mich.) Stem twining, terete, glabrous. Leaves 

 glabrous, sagittate, with long, acute, diverging auricles ; peduncles ax- 

 illary, 1-flowered, solitary, bracteate. Style 2-cleft. Capsule 2-celled. 

 — Purple. If. Through the summer. On the coast. 



10. C. re'pens, (Ell.) Ste?n twining, pubescent. Leaves sagittate, 

 with obtuse or truncate auricles, entire, pubescent, on long petioles ; 

 peduncles axillary, solitary, 1-flowered, thickened toward the summit, 

 pubescent. Calyx bracteate. Corolla with a long tube, the limb ob- 

 scurely 4-lobed. Style slightly 2-cleft. Capsule 3-celled. — White, 

 tinged with red. 11. April — May. On the coast 



11. C. tamnifo'lius, (Ell.) Stem twining, terete, hairy. Leaves cor- 

 date, slightly undulate, acuminate, entire, with hairy margins ; veins 

 on the under surface, muricate. Flowers in capitate clusters ; common 

 peduncle muricate, hairy. Calyx villous. Corolla small, 5-toothed. 

 Style slightly 2-cleft. Capsule 2-celled. — Blue. 0. Aug.— Sept 

 Middle Geo. 



