Ipomma. COXYOLVULACE^. 211 



-1— Creeping (or at least prostrate and not twining) perennials, glabrous or nearly so: flowers rather 

 large, opening at morning. 



, I. Pes-capra3, Sweet. Herbage succulent : leaves orbicular, mostly emarginate at 

 both ends, 2-glandular at base, fleshy, pinnately many-veined, 2 or 3 inches long, about 

 eq^ualled by the petiole: sepals oval, obtuse : corolla (nearly 2 inches long) broadly short- 

 funnclform, purple : mature capsule 2-celled : seeds rusty-pubescent. — " Hort. Lond. 

 ed. 2, 239 ; " Roth, Xov. PI. 109 ; Desc. Ant. ii. t. 130. /. maritima, R. Br. ; Bot. Reg. t. 319. 

 I. orbicularis, Ell. Sk. i. 2.37. Convolvulus Pes-caprce & Brasiliensis, L. — Drifting sands of 

 the coast, Georgia to Texas. (Most tropical coasts.) 

 I. acetossefolia, RcBm. & Sch. Stem slender, extensively creeping and freely rooting: 

 leaves slightly succulent, slender-petioled, exceedingly various; the earlier oblong or sub- 

 cordate, or emarginate at both ends, either entire or panduriform or 3-lobed ; the others 

 sometimes linear, sometimes deeply :j-5-lobed or parted, and the lobes narrowed at base ; 

 lobes obtuse : peduncles 1-flowered : sepals oblong, nmcronate or acuminate : corolla 

 oblong-funnelforra, white with yellowish throat, IJ to 2 inches long: capsule globose, thin- 

 walled, half inch broad, 4-celled : seeds densely villous-wooUy, globular. — .Syst. iv. 240 ; 

 Bcsc. Ant. ii. 1. 145 ; Meissn. in Fl. Bras. vii. 255, t. 94. /. carnosa, R. Br. Prodr., ex Benth. 

 Fl. Austr. iv. 420. Convolvulus littoralis, L. C. acetoscnf alius, ^'ahl, Eel. i. 18. C. stoloniferus, 

 Desr. in Lam. Diet. iii. .5.50; Cyr. PI. Rar. i. 14, t. 5. C. obtusilobus, Michx. Fl. i. 13;); Ell. 

 1. c. Batatas acetosafolia & littoralis, Choisy in DC. Prodr. ix. y3H, excl. syn. I. longifolia, 

 Benth. — Sandy sea-coast, S. Carolina to Texas. (Most tropical shores.) 

 I. longifolia, Bentll. Prostrate stems stent, 6 to 10 feet long : leaves thickish, short- 

 petioled, pinnately-veined, from linear- to oblong-lanceolate, entire, merely obtuse at base, 

 mucronate at tip, 2 to 5 inches long : peduncle 1-flowered : sepals broadly oblong or oval, 

 very obtuse : corolla very broadly open-funnelforra, white with purple throat, 4 inches 

 long, or when widely expanded 3 or 4 inches in diameter : capsule ovate, 2-celled, with 

 firm-coriaceous valves, an inch long : seeds oblong, rather minutely hairy at the angles. — ; 

 PI. Hartw. 16; Lindl. Bot. Reg. xxvi. t. 21; Torr. Bot. Mex. Bound. 149. /. Sluunardi, 

 Torr. in Marcy Rep. 191. — S. E. Arizona, Thurber, C. Wright. (Adjacent Mex.) 



I. BatAtas, Lam., the S\\-eet Potato of cultivation, belongs here, although it has the 

 flcsliy roots of the following, and the stems trail rather than creep : the leaves vary from 

 cordate-hastate to deltoid, and from nearly entire to laciniate-lobed or parted. Origin un- 

 known, unless from I. fastigiata of Trop. Amer. 



-i^ -i^ Twining, or at first trailing, but not creeping : leaves cordate or sagittate, or with divi-ions 

 broader than linear. 



-H- Perennials, with immense fleshy-farinaceous' roots: leaves cordate, entire, or some of them 3-5- 

 lobed: peduncles one - several-flowered : sepals oblong or ovate, obtuse or merely mucronate, over 

 half inch long : corolla over 2 inches long. 



I. Jalapa, Pursh. Freely twining from a napiform or thick fusiform root (white, some- 

 times weighing 40 or 50 pounds), tomentulose-pubescent, at least the lower face of the 

 shallow-cordate plicate-veiny repand or sometimes lobed leaves (these 3 to 5 inches long) : 

 corolla " opening at night," 3 or 4 inches long, white or light pink-purple ; the narrow tube 

 and throat 3 or 4 times longer than the calyx and deep purple : ovary imperfectly 4-celled : 

 seeds densely clothed with long villous wool. — Fl. i. 146 ; Bot. Reg. t. 342, 621 ; Griseb 1. c. 

 Coniolvulus Jalapa, L. ilant. 43 ; Desf. in Ann. Mus. Par. ii. 126, t. 40, 41 ; Sims, Bot. Mag. 

 t. 1572. Ipomcea macrorhiza, Jlichx. Fl. i. 141. ConrolruI.us macrorhiziis. Ell. Sk. i. 352. 

 Ipomcea Mechoacan, Nutt. in Am. Jour. Sci. v. 280. /. Michfiuxii, Sweet, 1. c. ; Chapm. Fl. 

 343. I. Purshii, Don, Syst. 1. c. Batatas Jalapa, Choisy, Convolv. & DC. 1. u. 33?. — Light 

 sandy soil along the coast, S. Carolina to Florida. (Mex., W. Ind., &c.) Apparently same 

 as the Mexican false or ilechoacan Jalap, but root of the U. S. plant hardly purg.itive. 



I. pandurata, Meyer. Glabrous or nearly so: stems trailing or twining: root very 

 long and large (at length weighing 10 to 20 pounds) : leaves (2 to 4 inches long) usually 

 cordate and entire, or some of the later angulate or panduriform-cordate, occasionally 

 hastate-3-lobed : corolla rather broadly funnelform, 2 or 3 inches long, white with a dark- 

 purple throat : ovary only 2-celled : seeds woolly on the angles. — Esseq. 100, as to name 

 only; Ker, Bot. Reg. t. 588; Choisy. 1. c. 381. Convohuhis megalorUzos, etc., Dill. Elth. 100, 

 t. 85, fig. 99. C. panduratus, L. ; Sims, Bot. Mag. t. 19.39; Ell. 1. c; Barton, Jled. t. 23. 

 C. candicans, Solander in Bot. JIag. 1. 1603, with some minute pubescence of leaves. Var. 



