CONVOLVULACE.E. XIV. IPOMOJA. 



271 



7/ . ? ^\ S. Native of Java, in the province of Tjangor, on the 

 Parang mountains, among bushes. Said to be allied to /. tubu- 

 losa. Corolla with a white limb and green rays. 

 Prickly Ipomcea. Fl. July. PI. tw. 



68 I. MELAXOSTICTA ; downy ; leaves roundish-ovate, deeply 

 cordate, with an acutish recess, and very blunt lobes, which are 

 acutish or mucronate at the apex, downy, and dotted with black 

 beneath : peduncles 1 -flowered, shorter than the petioles ; sepals 

 nearly equal, suborbicular, obtuse, mutic. If.. ? <r \ S. Native 

 of the Island of St. Thomas. Conv. melanosuctus, Schlecht, in 

 Linnaea. 6. p. 737. Coroila large, with a funnel-shaped limb 

 and ciliated margins. 



Blacfc-dotted-\ea\ed Ipomoea. PI. tw. 



69 I. TU'BA; leaves petiolate, broad-ovate, acuminated, deeply 

 cordate: hind lobes obtuse; peduncles bractless, 1 -flowered; 

 sepals nearly equal, obtuse, mucronulate ; corolla large, with a 

 long cylindrical tube, and a funnel-shaped limb. Ij .?*"*. S. 

 NativeofthelslandofSt.Tliomas. Conv. tuba, Schlecht, in 

 Linnaea. 6. p. 735. Stigmas orbicular. Seeds villous. 



T'ttfce-flowered Ipomoea. PI. tw. 



70 I. LCTE'OLA (R. Br. 1. c.) glabrous ; leaves cordate, acu- 

 minated, quite entire, hardly an inch long ; peduncles usually 

 1-flowered ; sepals acute ; corolla yellow. Tf,.?^. S. Native 

 of New Holland, within the tropic, on the sea shore. I. Brownii, 

 Roem. et Schultes, syst. 4. p. 252. 



Ye WormA-flowered Ipomoea. PI. tw. 



71 I. ABRU'PTA (R. Br. 1. c. p. 485.) glabrous; leaves cor- 

 date, acutish, having the recess at the base closed ; peduncles 

 1-flowered, hardly equalling the petioles in length ; sepals equal, 

 oval, obtuse. I/ .?'"'. S. Native of New Holland, within the 

 tropic. Conv. abriiptus, Spreng. syst. 1. p. 596. 



Abrupi-\ea\ed Ipomoea. PI. tw. 



72 I. SIBIRICA (Jacq. coll. 3. p. 304.) smooth ; stem trian- 

 gular ; leaves cordate, acuminated ; peduncles 1-2-flowered, 

 shorter than the leaves ; calyx bractless, ovate. Q. *^. H. 

 Native of Siberia. Pers. ench. 1. p. 183. Conv. Sibiricus, 

 Lin. mant. p. 203. Conv. rupestris, Pall. itin. 3. p. 723. t. k.? 

 Leaves hardly repand. Stipulas small, running down the stem. 

 Corolla white, or very pale red, with a yellow bottom, campanu- 

 late, one-half smaller than those of Conv. arventis. 



Siberian Ipomo?a. Fl. July, Aug. Clt. 1779. PI. tw. 



73 I. CURASSA'VICA (Roem. et Schultes, syst. 4. p. 237.) gla- 

 brous ; stems angular ; leaves roundish-cordate, thickisb, nerved 

 and pale beneath, rather repand ; peduncles 1-flowered, thick- 

 ened, bractless, shorter than the lower leaves, and longer than 

 the superior ones ; calyx subtubercled ; sepals ovate, adpressed. 

 If. . S. Native of Curassoa. Corolla white, verging to a 

 cream-colour, smaller than those of Conv. artentis. Capsule 

 glabrous. 



Curassoa Ipomcea. PI. tw. 



74 I. ALA'TA (R. Br. prod. p. 484.) glabrous; leaves cor- 

 date, acuminated, entire ; petioles margined ; peduncles tetrago- 

 nal, 1 -flowered, winged on the angles; bracteas caducous. I/.? 

 '"\ S. Native of New Holland, within the tropic, on the sea 

 shore. Conv. alatus, Spreng. syst. 1. p. 596. 



rrniged-peduncled Ipoaicea. " PI. tw. 



f f Leaves haslately and sagittately cordate or hastate, or 



sagittate. 



75 I. GRA'CILIS (R. Br. 1. c.) glabrous; leaves hastate, bi- 

 glandular beneath at the base, acute at both ends ; peduncles 1- 

 flowered ; sepals wrinkled, acute, 3 times shorter than the co- 

 rolla ; seeds bearded at the umbilicus. 7; . ? ^\ S. Native of 

 N\ w Holland, within the tropic, on the sea shore. Conv. gra- 

 cilis, Spreng. syst. 1. p. 604 -There are varieties of this 



plant with pilose stems, and having the hind lobes of leaves 

 bluntish. 



Slender Ipomoea. PL tw. 



76 I. PLEBE'IA (R. Br. 1. c.) downy ; leaves hastately cordate, 

 acuminated, entire: hind lobes rounded; peduncles 1-flowered, 

 shorter than the petioles, bibracteate near the base ; sepals 

 equal, acuminated, pilose ; capsule glabrous ; seeds woolly. 

 If. . ? r *. S. Native of New Holland, within the tropic. Conv. 

 plebeius, Spreng. syst. 1. p. 604. 



Plebeian Ipomoea. PI. tw. 



77 I. SAGITT<EFOLIA (Ker. bot. reg. 437.) glabrous; leaves 

 oblong-sagittate, the hind recess very deep, and the hind lobes 

 somewhat acuminated ; peduncles 1-flowered; sepals roundish- 

 oval ; corolla campanulately funnel-shaped. If. . rv . H. Native 

 from Virginia to Carolina, in wet situations, among bushes. 

 Convolvulus sagittaefolius, Michx. fl. bor. amer. 1. p. 138. 

 Pursh. fl. 1. p. 144. Conv. speciosus, Walt. fl. car. p. 93. 

 Conv. foratdsus, Gmel. syst. 1. p. 343. Catesb. car. 1. t. 35. 

 Flowers large, of a beautiful rose-colour. 



Arron-leated Ipomoea. Fl. June, Sept. Clt. 1819. Plant 

 twining. 



78 I. SETOSA (Blum, bijdr. p. 714.) leaves cordate, or sub- 

 hastately cordate, acuminated, entire, downy above, and rather 

 villous beneath ; peduncles 1-2-flowered, equal in length to the 

 petioles ; sepals linear-lanceolate, acuminated, setigerous ; stem 

 covered with retrograde hairs. ~if. . ^\ S. Native of Java, among 

 bushes on the mountains. Flowers purplish. Perhaps a species 

 of Pharbitis. 



Bristly Ipomoea. Fl. Year. PI. tw. 



79 I. JA'IAPA (Schiede et Deppe, mss.) glabrous ; stems 

 angular ; leaves membranous, perfectly glabrous, and even on 

 both surfaces, cordate-sagittate, acuminated : hind lobes rounded, 

 obtuse, quite entire ; peduncles 2-flowered, longer than the pe- 

 tioles ; sepals lanceolate, obtuse, rather unequal ; tube of corolla 

 long, narrow, twice as long as the limb, which is nearly entire 

 and spreading, y.. / "\ S. Native of Mexico, in the woods 

 of Chiconquiaco, from whence it is brought to Vera Cruz 

 by the inhabitants of Jalapa. The plant is called Purga 

 and Laschachne in Mexico. Convolvulus Jalapa, Houst. mss. 

 in Miller, diet. ed. 8. no. 31. Lin. mant. 1. p. 43, but not 

 of others. Ipomce a Purga, Wenderoth. Ipomce'a Sehiedeana, 

 Zucc. Stems purplish. Leaves often purplish beneath. Co- 

 rolla long, tubular ; tube ventricose above, constricted a 

 little at the throat ; with a flat limb, and exserted genitals. 

 Anthers oblong, emarginate at both ends. The leaves are said 

 to be variable in shape by Miller, who reared some plants from 

 seeds sent by Houston, in 1733, in the Apothecaries' Garden at 

 Chelsea. The peduncles generally bear 2 flowers, one of the 

 flowers always much earlier than the other. Houston and 

 Miller seem to be the only authors who knew the plant which 

 produces the true Jalap of the shops ; as the plant generally 

 described, cultivated, and known as such, is a very distinct spe- 

 cies, and appears to be only a purple-flowered variety of Ipomofa 

 macrorhiza of Michx. This plant is found principally in the 

 neighbourhood of Jalapa or Xalapa, hence the name. It abounds 

 also on the eastern slope of the Cordillera of Anahuac ; and 

 in the same latitude is procured the Manilla and Sarsaparilla. 

 From 200,000 to 300,000 Ibs. are annually exported from Vera 

 Cruz. Although the root forms a well-known and valuable 

 cathartic, which is perhaps more generally employed than any 

 other of vegetable origin, it was not until lately that the genus to 

 which it belongs was accurately ascertained. In its wild state, 

 the plant delights in a dry sandy soil. The dried root of jalap is 

 imported in thin, transverse slices, and in round masses ; it is 

 solid, hard, and heavy, of a dark grey colour. It has a sickly 

 smell, and a sweetish, subacid, nauseous taste. Powdered it is 



1 



