RUBIACEA. XV. Exostemma. 
segments, which are induplicate in estivation. Stamens ex- 
serted ; anthers narrow-linear, having the cells adnate at the base. 
Stigma undivided. Capsule 2-celled, dehiscing at the dissepiment 
from the apex, many-seeded. Seeds girded by an entire mem- 
branous border.—Trees or shrubs, usually glabrous. Leaves 
oval or lanceolate, on short petioles. Stipulas solitary on each 
side. Peduncles axillary and terminal. Flowers white or red- 
dish. The barks of all the species are destitute of quinine and 
cinchonine, according to St. Hilaire. 
Secr. I. Prro'nra (the bark of some of the species is called 
Quinquina Piton in the Antilles). D. C. prod. 4. p. 359. Limb 
of calyx parted almost to the base into teeth of various lengths. 
Corolla glabrous: having the tube longer than the segments. 
Stigma undivided.—Species all natives of the Caribbee Islands. 
The bark is febrifugal, somewhat emetic, and is sold in the shops 
under the name of Quinquina Piton of the Antilles. 
1 E. Carisz'um (Room. et Schultes, syst. 5. p. 18.) leaves 
ovate-lanceolate, acuminated, glabrous; pedicels axillary, 1- 
flowered, rather shorter than the petioles; calyx bluntly 5- 
toothed ; style and stamens about equal in length to the corolla. 
h. 5. Native of the Caribbee Islands, Guadaloupe, St. Do- 
mingo, Jamaica, Santa Cruz, &c.; and of Mexico. Cinchòna 
Caribæ'a, Jacq. amer. t. 179. f. 65. obs. 2. t. 17. Lamb. mon. 
t 4. Gærtn. fruct. 1. t. 33. f. 4. Cinchòna Jamaicénsis, 
Wright, in roy. soc. trans. lond. p. 67. p. 504. t. 10. Andr. 
bot. rep. t. 481. Flowers white, sweet-scented, about the Jength 
of the leaves; but according to Jacquin they are pale flesh- 
coloured. Stamens, according to Andrews’s figure, shorter than 
the segments of the corolla. Dr. Wright says that the jesuits’ 
bark of Jamaica rises only to 20 feet, with leaves of a rusty 
oa colour; and the young buds of a bluish green hue. The 
ark is generally smooth and grey on the outside, though in 
= daha and scabrous, when well dried, and the inside of a 
ea rown colour. Its flavour is at first sweet, with a mixture 
i taste of horse radish and of the aromatics of the East, 
at es swallowed of that very bitterness and astringency 
$ Ie characterises the Peruvian bark. It grows near the sea 
Shore, and is called in Jamaica Sea-side beech. 
Caribbean Exostemma. Fl. Ju. Jul. Clt. 1780. Tr. 20 ft. 
ie a LONGIFLO’RUM (Roem. et Schultes, syst. 5. p. 18.) leaves 
Hola anceolate, attenuated at both ends, glabrous; pedicels 
ie ary, very short; teeth of calyx long, linear-lanceolate, gla- 
PUE corollas 3 or 4 times longer than the leaves. h. S. 
A oe of St. Domingo. Cinchdna longifldra, Lamb. mon. p. 38. 
oa. ane of the synonymes. Flowers white, 5 inches 
£ etore expansion; segments linear; tube very long. 
ih ong-flowered Exostemma. FI. June, July. Clt. 1820. Tree 
feet? 
3 e cane'scens (Bartl. in herb. Hænke, ex D. C. prod. 4. 
a “ee leaves ovate-oblong, acuminated, canescent from villi 
fae r surfaces as weil as on the branchlets; peduncles axil- 
Me -Howered. h. S. Native of Mexico. The canescent 
pated; on the leaves, branches, pedicels, and young fruit distin- 
Suh Sienn = the other species. Flowers unknown. Cap- 
length of fruit the apex, not crowned by the calyx. Pedicels 
pmeacent Exostemma. Tree. 
Leaver A reUSTEo LUM (Reem. et Schultes, syst. 5. p. 19.) 
eri inear-lanceolate, pubescent beneath, as well as on the 
TNR ; peduncles terminal, corymbose; calycine teeth linear- 
of ors h. S. _ Native of St. Domingo, on the rocky banks 
Ghat ts. Cinchéna angustifolia, Swartz, prod. p. 42. fl. ind. 
“Pre p 380. act. holm. 1787. PLI t3: Lamb. cinch. 29. 
Bona apsule oblong, pentagonal. Branches and pedicels rather 
= ne forming a terminal corymbose panicle. Co- 
481 
rolla glabrous, white? about the size of those of E. Caribe'um, 
sweet-scented. 
Narrow-leaved Exostemma. Tree 10 to 15 feet. 
5 E. corza‘ceum (Roem. et Schultes, syst. 5. p. 20.) leaves 
ovate, scarcely acute, coriaceous, glabrous on both surfaces, 
shining; branches and flowers glabrous; peduncles axillary, 
2-3-flowered; teeth of calyx short, acute; corollas about the 
length of the leaves; capsules ovate, smooth. kh. S. Native 
of St. Domingo. Cinchdna coridcea, Poir. dict. 6. p. 38. 
Peduncles 2 or 8 times shorter than the leaves. Seed girded 
by a membranous wing. Corolla glabrous, 2 inches long, with 
a-terete tube and narrow reflexed segments. Branches of pa- 
nicle dichotomous. 
Coriaceous-leaved Exostemma. Tree. 
6 E. rinna‘rum (Roem. et Schultes, syst. 5. p. 18.) leaves 
ovate, acuminated, and are as well as the branches and flowers 
glabrous; peduncles terminal, corymbose ; calycine segments 
linear; capsule pentagonal. h. S. Native of St. Domingo. 
Cinchona lineata, Vahl. symb. 2. p. 27. act. soe. hist. nat. hafn. 
1. p. 20.t.4. Lamb. mon. p. 26. t. 6. Panicle corymbose, 
terminal, trichotomous. Leaves marked with lines on the upper 
surface. Flowers an inch long, white. 
Lined-leaved Exostemma. Tree 20 to 30 feet. 
7 E. parvirro’xum (Rich. in Humb. et Bonpl. pl. equin. 1. 
p. 132.) leaves oval, mutic, furnished with porose glands in the 
axils of the nerves; petioles, branches, and peduncles pubes- 
cent; fascicles of flowers axillary and terminal, crowded ; teeth 
of calyx short. h. S. Native of the Caribbee Islands. 
Small-flowered Exostemma. Tree. 
8 E. pracuyca’rrum (Roem. et Schultes, syst. 5. p. 19.) 
leaves elliptic, obtuse, and are as well as the branches and 
flowers glabrous; peduncles terminal, corymbose; teeth of 
calyx short, acutish ; capsules ovate or obovate, ribbed. k. S. 
Native of the eastern parts of Jamaica, in shady parts 
of mountains. Cinchòna brachycárpa, Swartz, prod. p. 42. fl. 
ind. occid. 378. Lindsay, roy. soc. trans. edinb. 1794. p. 214. 
t. 5. Vahl, act. soc. hist. nat. hafn. 1. p. 22. Lamb. cinch. 
p. 18. t. 8. Panicle terminal, corymbose, trichotomous. Co- 
rolla 34 inches long before expansion, pale red or flesh-coloured. 
Leaves 5-6 inches long, deep green. ‘The bark, when wounded, 
emits a whitish juice ; which becomes of a brownish purple colour 
on drying, and is easily reduced into a greyish purple powder, 
which is at first sweet, but afterwards very bitter and astringent. 
Short-fruited Exostemma. Tree 20 feet. 
9 E. rrirto RUM; leaves lanceolate, obtuse, attenuated at the 
base, quite glabrous, and shining on both surfaces; branches 
glabrous; corymbs compound ; peduncles 2-3-flowered ; caly- 
cine teeth subulate; corolla with a very long filiform tube, and 
long, narrow, linear, dependent segments; capsule obovate, 
h. S. Native of Jamaica. Cinchona triflora, Wright, in edinb. 
med. journ. p. 240. Lamb. cinch. p.15. It comes nearest to 
E. floribindum, but differs from it in the leaves being ovate- 
elliptic, acuminated, not attenuated at the base ; the corymbs 
of flowers are also much larger and closer; the teeth of the 
calyx are shorter and broader; the tube of the corolla is much 
shorter and wider; and the capsules oblong~cylindrical. 
Three-flowered Exostemma. ‘Tree 20 feet. 
10 E. rrorieu’Npa (Reem. et Schultes, syst. 5. p. 19.) leaves 
elliptic, acuminated, and are as well as the branches and flowers 
glabrous ; peduncles terminal, corymbose ; teeth of calyx short, 
acute; capsules turbinate, smooth. k. S. Native of the 
Caribbee Islands, Jamaica, Guadaloupe, St. Domingo, St. Lucia, 
and Trinidad, in woods on the banks of mountain streams. 
Cinchdna floribúnda, Swartz, prod. p. 41. fl. ind, occid. p. 375. 
Lamb. mon. p. 17. t. 7. Cinchdna montana, Badier. in journ. 
pbys. pe febr. p. 129, t. 1. Cinchòna, St. Lùciæ, David, phil, 
3 
