Ipomaa. CONVOLVULACEiE; 211 



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

 large, opening at morning. 



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

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

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

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

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

 I. orbicularis, Ell. Sk. i. 257. Convolvulus Pes-caprce & Brasiliensis, L.— Drifting sands of 

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

 I. acetosaefolia, Rcem. & 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 3-5-lobed or parted, and the lobes narrowed at base ; 

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

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

 walled, half inch broad, 4-celled : seeds densely villous-woolly, globular. — Syst. iv. 246 ; 

 Desc. Ant. ii. 1. 145 ; Meissn. in Fl. Bras. vii. 255, t. 94. 7. camosa, R. Br. Prodr., ex Benth. 

 Fl. Austr. iv. 420. Convolvulus littoraUs, L. C. acetoscef alius, Vahl, Eel. i. 18. C. stoloniferus, 

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

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

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

 I. longifolia, Benth. Prostrate stems stout, 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-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 minutely hairy at the angles. — 

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

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

 I. BatAtas, Larn., the Sweet Potato of cultivation, belongs here, although it has the 

 fleshy 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— -1— Twining, or at fii-st trailing, but not creeping : leaves cordate or sagittate, or with divisions 

 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-veinj' 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. Ipomaa macrorhiza, Michx. Fl. i. 141. Conrolmdiis macrorhizus, Ell. Sk. i. 352. 

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

 343. I. 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 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. Convolvulus megalorhizos, etc.. Dill. Elth. 100, 

 t. 85, fig. 99. C. panduratus, 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. 



