Ipomoea. CONVOLVULACEiE. 211 



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

 large, opening at morning. 



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

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

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

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

 cd. 2, 289 ; " Roth, Nov. PI. 109 ; Desc. Ant. ii. t. 130. /. maritima, R. Br. ; Bot. Reg. t. 319. 

 /. orbicidan's, Ell. Sk. i. 2-57. Convolvulus Pes-caprce & Brasiliensis, L. — Drifting sands of 

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



I. acetoSBefolia, Roem. & Sch. Stem slender, extensively creeping and freely rooting : 

 leaves slightly succulent, slender-petioled, exceedingly various ; the earlier ol)long or sub- 

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

 sometimes linear, sometimes deeply 3-5-lobed or parted, and the lobes narrowed at base ; 

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

 oblong-funnelform, white with yellowish throat, IJ to 2 inches long : capsule globose, tliin- 

 walled, half inch broad, 4-celled : seeds densely villous-wooUy, globular. — Syst. iv. 24G ; 

 Desc. 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. acetoscefolius, Vahl, Eel. i. 18. C. stoloniferus, 

 Desr. in Lam. Diet. iii. 550 ; Cyr. PI. Rar. i. 14, t. 5. C. obtusilohus, Michx. Fl. i. 139; Ell. 

 1. c. Batatas acetoscefolia & littoralis, Choisy in DC. Prodr. ix. 338, excl. syn. /. lonyifolia, 

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

 I. longif olia, Benth. Prostrate stems stout, 6 to 10 feet long : leaves tliickish, 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-f unnelform, 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 minutel}' 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 Sweet Potato of cultivation, belongs here, although it has the 

 flesliy 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. 



-t— -1— Twining, or at first trailing, but not creeping: leaves cordate or sagittate, or with divisions 

 broader tliau linear. 



++ Perennials, witli 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 (wliite, 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. 

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

 t. 1572. Ipomcea macrorhiza, Michx. Fl. i. 141. Convolvulus macrorhizus, Ell. Sk. i. 352. 

 Ipomaea Mechoacan, Nutt. in Am. Jour. Sci. v. 289. /. Michauxii, Sweet, 1. c. ; Chapm. Fl. 

 343. /. Purshii, Don, Syst. 1. c. Batatas Jalapa, Choisy, Convolv. & DC. 1. c. 338. — Light 

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

 as the Mexican false or Mechoacan Jalap, but root of the U. S. plant hardly purgative. 



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 f unnelform, 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. Convolvulus merjalorhizos, etc.. Dill. Elth. 100, 

 t. 85, fig. 99. C. pandurafus, L. ; Sims, Bot. Mag. t. 1939 ; Ell. 1. c. ; Barton, Med. t. 23. 

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



