ORO 
oo a mountain of Afia, in Media, near Ecbatana. 
Ptolem 
bly to rum Whe sn er the fimilarity of found led Linneus 
to ti will not prefume to eran. Linn. 
Gen. 172. eae. a6. Willd. S ae 1 
art. 
Mill. Di&. v. 3. Ait. Hort. Kew. ed. 2. v. 2. 306. Tae 
Lamarck Illuitr. t. 251.—Clafs and order, Hexandria Mono- 
syria. at. Ord. eas Linn, 
h. reforme Cal. 
fhorter than the corolla; anthers roundifh, of lobes 
buriting atthetop. Pi n fuperior, large, roundith, 
deprefled ; ftyle none; ftigma roundifh, v i 
p ) 
Drupa roundifh. Seed. Nut bs folitary, of a bony 
ubftance 
h. Corolla inferior, in fix deep inflexed fegments. 
Stamens flat, inferted into the corolla. Stylenone. Drupa 
with one bony feed. 
We have endeavoured to correét the generic cha- 
rater, from a comparifon of both the known fpecies. 
Buchanan met with a plant in Nepal, there called Tileufta, 
whofe habit is precifely that of O. japonicum, but the draéteas 
are very long, and the fruit a berry of three cells, with fix 
feeds when in perfection, though indeed fome of both are 
saci! abortive. 
. aquaticum. Aquatic Orontium. Linn. Sp. Pl. 463. 
Aaa. Acad. v. 3. 17. t. 1. f.3. Willd. n. 1. Ait. 
n. 1.—Leaves floating, ttalked.— Native of rivers and pools 
in North America ria an in cifterns at ae where it 
flowers in June and Ju 
o) 
2. pie rontium. Thunb. Japon. 144. 
Willd. n. 2. Ait. n. 2. Curt. Mag. t. eae Banks Te. 
(Kiro et Rirjo, vulga Omotto; Kempf. 
785. )—Leaves erect, dilated and toon at 
the bafe. Ot Native of Japan, growing in wafte ground, and 
i to occupy = Gata in gardens as would other- 
wife are. It is a hardy perennial at Kew, flowering 
very ang in the ipring, he root is thick os long, with 
numerous ftrong fimple fibres. Stem none. Leaves nu- 
merous, tea coriaceous, {mooth, ribbed, convoluted, 
VoL. XXV. 
ORO 
oe a foot high, with a dilated fheathing bafe. Spikes 
olitary, on fhort, fimple, round, upright, radical /falks, 
ol Jpike about an inch and half long, cylindrical, obtufe, 
very denfe, of numerous, crowded, greenifh-yellow flowers, 
the inflexed broad fummits of whole crowded petals give the 
whole a teffellated afpe&&. Kempfer defcribes the Bait the 
fize and fhape of a {mall olive, fcarlet, naufeous, with a 
heart-fhaped bony feed. The braéeas are fhort, rounded, 
and membranous, like thofe of the firft {pecies. 
OROOLONG, in Geography, the name of one of the 
Pelew ifles, on which Capt. Wilfon was wrecked. See 
LEW 
ely toes 
extended delta oppofite to the ifle of 
chief eftuary is confiderably to the 
Many large rivers flow into the Oroonoko ; and befides its 
fingular form, it has other nae a From 
the S.E. of the lake of Parima, whic a kind 
inundation formed the sae " hite river, 
called alfo that of Parima, joins the Block ri river, and thence 
the great flood of the Marazon. Another ftream, called the 
Siaba, flows from the S.W. the lake into the Black 
river, and joins another ftream, which dire&ly connects the 
Maranon with the Or . e c 
-thefe three great rivers. y 
veller, Humboldt, refolved re gl ar the reported fat of 
the of the Oroonoko with the Maranon, by the 
ro. He entered | the ce by the river 
this fort he returned to the Orinoco by the river Catia 
a very ftrong branch of the Orinoco, which communicates 
with the river Negro. This navigation was ies 
fatiguing and dangerous by the force of the current, the 
prodigious number of mofquitoes and ants, and the want of 
population, 300 leagues shel been travelled by him with- 
out feeing a human cpseiae red the Orinoco 
by the Cafiquiari at 3° a remo nied the current of 
the Orinoco to Efmeralie the laft Spanith fettlement in 
anne ine. 
The mouths of the Orincco are of perilous ee 
and require an expert pilot. Seven of them are navigable 
for large veffels; but the chief is the great mouth, about 
fix leagues wide, being the moft fouthern, and in the dire&t 
courfe of the river. ‘The ifles of the Orinoco, or fges its 
Delta, which is of prodigious extent, are poffe by the 
Guaranos and the Mariufas, two independent tribes of In. 
dians. The river Caroni, running from the 5. tot the N. for 
nearly 100 leagues, is celebrated in the expedition of Ra- 
leigh. It preferves its clearnefs for half a league after it 
joins the Orinoco, having moftly run over a fine k 
and. 
The beauty and grandeur of the barks of the Orinoco 
furpafs all defcription, Forefts of the moft fuperb verdure 
are crowded with birds and monkies cf the moft various and 
4k brilliant 
