264 CONVOLVULACE. XI. 
Conv. muricátus, Ham. herb. Stem hardly prickly. Peduncles 
ake, 2-4-flowered. Flowers very large, pure white, the 
border being from 4-6 inches in diameter, delightfully but 
faintly fragrant, opening at sun-set and drooping at day-light ; 
tube very long, cylindrical. 
Roxburgh’s Calonyction. Fl. July, Oct. Cit. 1799. 
3 C. murica‘tu ; sepals equal, long, acuminated ; leaves cor- 
date, acuminated, entire. (2. ^C. S. Native of Persia and the 
East Indies. Ipomoe'a muricata, Jacq. schoenbr. 3. p. 40. t. 323. 
Roxb. fl. ind. 2. p. 89. Convélvulus muricatus, Lin. mant. p. 
44. Willd. enum. 1. p. 204. Ipomoe'a turbinàta, Lagasc. gen. 
et spec. nov. diagn. p. 10. no. 139. C. speciosum, var. f. mu- 
ricàtum, Choisy, l. c.) I. bóna-nóx. (3. purpurascens, Ker. 
bot. rep. 290. Stem and peduncles muricated from prickles. 
Flowers large, pale bluish-purple; lobes mucronate, tube 
widening a little towards the mouth, hairy inside, ex Roxb. 
Peduncles 2-6-flowered. 
Muricated Calonyction. FI. July, Oct. Clt. 1777. Pl. tw. 
4 C. pseupomurica‘tuM (Bernh. hort. elfort, ex Link. enum. 
l. p. 200. under Jpomee‘a) stem muricated; leaves cordate, 
acuminated, glabrous, 7-nerved ; peduncles shorter than the pe- 
tioles; sepals acuminated. 5.^. S. Native country unknown. 
Corolla purple. "Very like C. muricàtum, but smaller, and the 
leaves are 7-nerved instead of 9-nerved. 
False-muricated Calonyction. Fl. July, Oct. 
Shrub tw. 
5 C. A'seenuM (Choisy, l. c. p. 442.) sepals unequal, short- 
acuminated. ¢.%.S. Native of Silhet. Convélvulus ásper, 
Wall. cat. no. 1388. Stem beset with retroflexed, spiny tubercles, 
particularly on the older branches. Leaves cordate, acuminated ; 
hind lobes sometimes roundish-obtuse, and sometimes angularly 
toothed. Peduncles 1-flowered. Sepals adpressed to the base 
of the calyx. Corolla tubularly funnel-shaped, 3-6 inches long. 
Capsule glabrous, size of a cherry. Seeds angular, downy, 
especially on the angles. 
Rough-stemmed Calonyction. . Pl. tw. 
6 C. rricnospe’rMum (Choisy, l. c.) sepals unequal, obtuse. 
Y.? ^. S. Native of Java. Ipomee‘a trichospérma, Blum. 
bijdr. p. 710. Stem quite glabrous. Leaves hastately 3-5- 
lobed; middle lobe elliptic-oblong, attenuated at both ends, 
very acute at apex; lateral ones acute at apex, and cuneated at 
the base, as also bifid, quite glabrous. Peduncles 1-flowered. 
Sepals ovate; inner ones rarely mucronate at apex. Corolla 
tubular, much longer than the calyx, white. ? : 
Hairy-seeded Calonyction. | Pl. tw. 
7 C. GRANDIFLÒRUM (Choisy, l. c.) sepals equal, acute. 
31.7. S. Native of the West Indies. Convólvulus grandifló- 
rus, Lin. suppl. p. 136. Desr. in Lam. dict. 3. p. 543. And. 
bot. rep. t. 403. — Convólvulus latiflórus, Desr. in Lam. dict. 
3. p. 561. Ipomoea latiflóra, Roem. et Schultes, syst. 4. p. 240. 
—Plum. cat. 1. mss. vol. 2. p. 52.— Tourn. p. 83. Leaves 
large, glabrous, cordate, acuminated. Corolla snow-white, 
with a long, cylindrical, greenish tube; limb 5 inches in dia- 
meter, expanding at night, and fading at day-light. According 
to Roem. et Schultes, l. c. the 2 outer sepals are longer, and 
acute, and the 3 inner obtuse. 
Great-flowered Calonyction. Fl. Aug. Oct. Clt.? Pl. tw. 
8 C. PTE'RIPES; glabrous; peduncles winged, 2-flowered ; 
pedicels clavate, divaricate; sepals large, elliptic-oblong, ob- 
tuse. d.? ^. S. Native of Huayaquil. Leaves cordate, 
acuminated: auricles rounded. ^ Peduncles longer than the 
leaves. Corolla downy, (v. s. in herb. Ruiz. et Pav.) 
Winged-peduncled Calonyction. Pl. tw. 
9 C. cuAvA' TUM ; sepals wide, mucronate, nearly equal, mem- 
branous; stem and petioles pilose; leaves glabrous. 4.?^. 
S. Native of Huayaquil. Convólvulus clavatus, Ruiz. et Pay. 
Clt. 1820. 
Caroxvcriow. XII. Exoconium. 
mss. in herb. Lamb. Leaves cordate, glaucous beneath, acumi- 
nated : auricles rounded. Corolla blue, like those of a species 
of Datüra, with narrow segments. 
Clavate Calonyction. Pl. tw. 
10 C. Jaceur wir; sepals unequal, obtuse ; leaves cordate, 
acute. 5h.^. S. Native of Martinico, on the banks of rivers. 
Convólvulus grandiflórus, Jacq. vind. 3. p. 39. t. 69. Plant 
glabrous. Leaves large, cordate. Peduncles axillary, 1-flow- 
ered. Corolla pure white ; tube widening to the top. Seeds 
brown, rather woolly. 
Jacquin's Calonyction. Shrub tw. 
Cult. The species of Calonyction are among the largest 
flowering convolvulaceous plants. A light rich soil isthe best for 
them, or a mixture of loam, peat, and sand. They should be 
reared on a hot-bed, and when of sufficient size they should be 
planted in separate pots, and shifted from size to size as they 
grow. They succeed best when trained up trellis-work, or 
rafters in stoves. 
XII. EXOGO'NIUM (from ew, exo, outwardly ; and ywvia, 
gonia, an angle; in reference to the exserted stamens.) Choisy 
in mem. soc. phys. gen. 6. p. 443. but not of Mocino and 
Sesse.— Convólvulus and Ipomoe a species of authors. 
Lin. syst. — Pentándria, Monoginia. Calyx of 5 sepals. 
Corolla middle-sized, tubular. Stamens exserted. Style one; 
stigma capitate, 2-lobed. Ovarium 2-celled ; cells 2-ovulate. 
—Climbing plants, natives of America. 
1 E. sracrea‘tum (Choisy, l. c.) glabrous; leaves cordate ; 
racemes elongated, many-flowered ; flowers bracteate; bracteas 
large, cordately reniform, coloured. h. ^. S. Native of New 
Spain, near La Venta de Acaguisotla, at the altitude of 504 
hexapods. Ipomee‘a bracteàta, Cav. icon. 5. p. 51. t. 477. 
Ipomoe'a spicata, H. B. et Kunth, nov. gen. 3. p. 112. Conv. 
obovallatus, Spreng. syst. 1. p. 595. Ipomoe'a cíncta, Willd. 
Branches angular, white, glabrous. Flowers pedicellate, distinct, 
reflexed. Corollas tubularly funnel-shaped, glabrous, yellowish 
outside and purplish-red inside ; the limb in the plant described 
by Cav. is entire and reflexed, but in the plant described -by 
Kunth, the limb is plicately 5-cleft, and the segments mucronate. 
Seeds oblong, black, downy. 
Bracteate-flowered Exogonium. Shrub. tw. 
2 E. ritirérMe (Choisy, l. c.) leaves oblong-cordate, obtuse, 
mucronate ; peduncles racemose, filiform. h.™. S. Native 
of Martinico and the Antilles, in woods. Ipomoe'a filifórmis, 
Jacq. amer. p. 27. t. 19. pict. p. 20. t. 26. Willd. spec. 1. p. 
883. Convdlvulus filifórmis, Desr. in Lam. dict. 8. p. 555. 
Plant quite glabrous. Racemes loose-flowered. Flowers purple, 
copious. Calyx small, acute. Corolla with a very long tube, 
and obtuse segments, Filaments 5, exceeding the corolla, alter- 
nating with 5 sterile ones, which are much shorter. 
Filiform Exogonium. Fl. Sept. Oct. Clt. 1823. Sh. tw. 
3 E. nzPA'NDuM (Choisy, l. c.) leaves cordate, oblong, repand, 
acuminated ; peduncles branched, cymose. ^.^. S. Native 
of South America and Martinico. Ipomoe'a repánda, Jacq. 
amer. 28. t. 20. pict. t. 27. Sal. par. t. 81. Convélvulus re- 
pándus, Desr. in Lam. dict. 3. p. 555. Plant quite glabrous. 
Stem terete. Lower leaves sometimes 3-lobed, all glaucous be- 
neath. Peduncles length of leaves ; partial ones often trichoto- 
mous. Flowers scarlet, 2 inches long. Calyx the same colour 
as the corolla, small, obtuse. Limb of corolla reflexed ; seg- 
ment narrow, obtuse. 
Repand-leaved Exogonium, 
Shrub. tw. 
Cult. All the species of this genus are elegant and singular. 
Light rich soil, or a mixture of loam and peat, or decayed 
Jeaves and loam suits them best. They are well adapted for 
Hiskeb= Nov; Cl: 1799; 
