268 



CONVOLVULACE.E. XIV. IPOMGEA. 



ovate, or oblong-lanceolate, sinuately-toothed, stnootbish ; 

 flowers axillary, solitary, pedunculate, longer than the leaves ; 

 calyx glabrous, sepals unequal, linear, obtuse. \i . S. Native 

 of Mexico, near Guanaxuato. Convolvulus stans, H. B. et 

 Kunth, nov. gen. amer. 3. p. 96. Conv. firmus, Spreng. syst. 

 1. p. 613. Corolla campanulate, pale violet, with a whitish 

 tube and rounded segments. 



Standing Ipomcea. Shrub erect. 



33 I. PANNOSA (R. Br. 1. c.) tomentose, suffruticose, erectish ; 

 leaves quite entire, oblong, bluntish, pannosely tomentose ; pe- 

 duncles 1 -flowered; sepals acuminated: the 2 inner ones one 

 half smaller than the outer ones. T? . S. Native of New Hol- 

 land, within the tropic, on the sea shore. Convolvulus panno- 

 sus, Spreng. syst. 1. p. 612. 



C/oiA-leaved Ipomoea. Shrub erect. 



34 L FILIFOLIUS (Hook, et Arn. in Beech, voy. pt. bot. p. 

 35. under Convolvulus) shrubby, much branched, diffuse ; leaves 

 very narrow-linear, terete ; flowers axillary, solitary, on short 

 peduncles ; corolla campanulate. fj . G. Native of Chili, at 

 Coquimbo. Calyx 5-cleft ; with linear teeth on the segments. 

 Corolla blue, an inch broad. 



Thread-leaved Ipomcea. Shrub diffuse. 



SECT. III. STROPHIPOMCE'A (from orpoQaui, slrophao, to turn 

 or twist ; and Ipomce"a ; in reference to the twining stems of 

 the species). Choisy, in mem. soc. phys. gen. 6. p. 450. Stems 

 twining. 







1. Leaves entire, undivided, usually cordate. Capsules gene- 

 rally large. Anthers usually twisted. 



* Stems angular or winged, 



35 I. TDRPE V THUM (R. Br. prod. p. 485.) stems angular, gla- 

 brous, or a little downy ; leaves cordate-ovate, acuminated, some- 

 times entire, sometimes angularly sinuated, or crenated; peduncles 

 thick, 1-4-flowered, bracteate at apex ; outer sepals the largest, 

 ovate-roundish. I/. / "\ S. Native of the East Indies, on the 

 banks of the Hoogly and Ganges ; New Holland ; Timor ; 

 Otaheite ; Friendly and Marianne Islands, &c. Ker. bot. reg. 

 279. Roth. nov. spec. p. 111. Convolvulus Turpethum, Lin. 

 spec. p. 221. Blackw. t. 397. Sims, bot. mag. t. 2093. Wall, 

 fl. ind. 2. p. 57. Hook. bot. misc. 3. p. 297. Wight, ill. suppl. 

 t. 88. Conv. Gaudichaudii and Riedlei, Choisy, mss. Herm. 

 lugdb. 177. t. 178. and 179. Conv. velutinus, Wall. cat. no. 

 1371. Plenck. off. t. 105. Root thick, purgative. Leaves 

 nearly glabrous or downy. Corolla campanulate, twice longer 

 than the calyx, white, size of those of Calystegia septum. 

 Capsule showy, size of a nut. The bark of the roots is em- 

 ployed by the natives of the East Indies as a purgative, which 

 they use fresh rubbed up with milk. About 6 inches in length 

 of the root they reckon a dose. Cattle do not eat the plant. 

 The root being free from nauseous taste and smell, gives it a 

 decided superiority over jalap, for which it might be substi- 

 tuted. Turpethum is derived from its Arabic name Turbib. 



Turpethum Ipomcea. Fl. March, June. Clt. 1752. Plant 

 twining. 



36 I. A'NCEPS (Rcem. et Schultes, syst. 4. p. 231.) stem 4- 

 winged ; leaves cordate-oblong, somewhat sagittate or ovate, 

 mucronulate at apex ; peduncles 2-5-flowered, bracteate at 

 apex ; sepals unequal : 2 outer ovate, villous outside : the 3 

 inner smaller, oblong. I/ . / " v . S. Native of Bengal, Ceylon, 

 Java, &c. Convolvulus anceps, Lin. mant. p. 43. Vahl, symb. 

 3. p. 31. Peduncles and pedicels villous. Capsule large. 



Two-edged-stemmed Ipomoea. PI. tw. 



37 I. TRI'QUETRA (Rcem. et Schultes, syst. 4. p. 231.) stem 

 downy, triquetrous ; leaves cordate, acute, rather villous ; pe- 

 duncles 2-5-flowered, bracteate; outer sepals bractea- formed, 

 ovate, acute, mucronate : inner ones shorter, and rounded at the 

 apex. y.. . S. Native of the Islands of Santa Cruz, St. 

 Thomas, &c. Conv. triquetra, Vahl. symb. 3. p. 30. Willd. 

 spec. 1. p. 858. Lateral pedicels 2-flowered, middle one 1- 

 flowered. Bracteas ovate, coloured, downy. 



Triquetrous-stemmed Ipomcea. PI. tw. 



38 HAMiLTbNii; stems a little winged ; leaves scattered, recurv- 

 ed, petiolate, cordate-ovate, acuminated, veiny, concave ; pedun- 

 cles usually 1-flowered, at first terete, afterwards 4-winged, and 

 at length 5-angled ; bracteas sessile, lanceolate, acuminated, a 

 little coloured, nearly opposite ; flowers large, yellow. T . *"\ 

 S. Native of Tobago, near the town of Scarborough. Conv. 

 alatus, Hamilt. prod. p. 24. This species is said to come nearest 

 I. anceps, and Conv.flavus. 



Hamilton's Ipomcea. PI. tw. 



* * Stems terete. 



39 I. CAMPANULA'TA (Lin. spec. 228. Lour, cocli. p. 112.) 

 leaves cordate, acute ; peduncles many-flowered, spicately 

 branched; sepals equal, ovate-orbicular, glabrous. If.. *"\ S. 

 Native of the East Indies, Timor, Cochin-china, &c. Convol- 

 vulus campanulatus, Spreng. syst. 1. p. 608. Adamboe, Rheed. 

 mal. 11. p. 115. t. 56. Stem reddish, glabrous, terete, densely 

 branched, fistular. Leaves glabrous, reticulated with red-fea- 

 thered nerves, 4-6 inches long, and 1-3 broad. Corolla large, 

 yellow, ex Lour. Capsule large, globose, glabrous. Seeds 

 clothed with silky villi. 



Campanulate-fiov/ered Ipomcea. Fl. Aug. Sept. Clt. 1800. 

 PI. tw. 



40 I. SULPHU'REA ; glabrous ? ; leaves cordately-sagittate, 

 entire ; peduncles 3-flowered, much longer than the petioles ; 

 sepals glabrous, obtuse, adpressed ; filaments villous at the 

 base ; anthers twisted into a spire. If. . *"*. S. Native of 

 Mexico, on walls at St. Jose de Corral. Convolvulus sulphu- 

 reus, La Lave, et Lexarza, nov. veg. mex. fasc. I . p. 17. 

 Calyx yellowish. Corolla sulphur-coloured, campanulate, with 

 a 5-plicate limb : each plica composed of 2 roundish crena- 

 tures. Capsule round, velvety, black. 



jSu/p/iur-coloured-flowered Ipomcea. Fl. Feb. PL tw. 



41 I. PETALoinEA (Choisy, in mern. soc. pliys. gen. 6. p. 451.) 

 leaves sometimes saggittately-lanceolate, acute, with sinuated 

 edges ; sometimes linear, and sometimes ovate ; sometimes 

 ovate-lanceolate ; often hardly cordate ; sometimes obtuse at 

 the apex, and mucronulate ; peduncles 1-4-flowered, bracteate, 

 sometimes numerous, approximate, appearing like a 9- flowered 

 peduncle ; sepals ovate-orbicular ; corolla 5-cleft. If.. r *. S. 

 Native of the East Indies ; at Prome ; and Gorukpur ; as well 

 as of Timor. Convolvulus crispatulus, Wall. cat. no. 1403. 

 Conv. reticulatus, Ham. herb. Stems terete, glabrous, branched. 

 Leaves reticulately veined, 2-3 inches long, glabrous. Corolla 

 3 times longer than the calyx, deeply divided, silky outside, 

 red. This is a very variable plant in the leaves. Capsule large, 

 size of a nut. 



Petaloid Ipomcea. PI. tw. 



42 I. BUFALINA (Choisy, in mem. soc. phys. gen. 6. p. 452.) 

 leaves cordately sagittate, glabrous ; peduncles many-flowered ; 

 corolla yellow, campanulate. It.^.S. Native of Cochinchina, 

 in woods. Convolvulus bufalinus, Lour. coch. p. 109. ed. 

 Willd. 1 p. 134. Stem woody, scandent, glabrous. Corolla 

 large, campanulate. Capsule large, 2-celled, 2-seeded. Anthers 

 filiform, spirally twisted. 



