CROWEA LATIFOLIA, &c. 
223 
ie essential oil, with which the little sacs in the leaves and bark are replete ; 
id which may be communicated to either water or spirits by infusion. In some 
'ises, as in the various species of Dictamnus, this fragrant oil becomes vapourised in 
ich quantities, that in hot, dry weather, if a lighted candle be brought near the 
lant, the oily exudations ignite and burn with a crackling noise; and a similar 
;nition takes place, but in a less degree, in several species of Diosma : this, how- 
ver, is only observable when the night is dark. 
In addition to the aromatic essential oil, which is in some species very acrid, all 
lutacecB contain a bitter principle, varying in intensity in the different species : 
I iany of them have been found useful in medicine. They chiefly act on the 
ervous system as stimulants ; and therefore, in New Holland, some of the settlers 
se the leaves of Correa alba , and other species, as tea ; and some of the American 
oecies, ranking under the groups Cuspariece and Pilocarpece, are febrifugal. The 
jagostura bark is the produce of Galipea Cusp aria, and the barks of Esenbeckia 
ibrifuga, Ticorea febrifuga, and Hortia Braziliana, possess similar properties, but 
erhaps in a less degree. 
Of the seven groups of genera into which the order is now divided, Cusparieas 
ad Pilocarpe.ze are wholly from America ; Boronieaj are natives of Australia ; 
IudiosmEjE are from Southern Africa, chiefly about the Cape ; and Dictamnea], 
Iute-ZE, and Cneoreas, all occupy different localities in Europe. The native 
ountries of each of these tribes will in part point out the modes to be pursued 
i their cultivation. 
Of the Genera Almeidea and Diglottis, both unknown in British collections, 
even species have been described of the first, and one of the last. They are all 
tatives of Brazil, and bear flowers in panicles : they have no doubt been several 
imes brought into Europe, but have been again lost without flowering, so never 
ame under the especial notice of cultivators. 
Erythrochiton. — One species only is known, Braziliensis. It is a fine plant, 
Towing in Brazil to a small tree about ten feet high, with the habit of a Tlieoplirasta t 
he stem being altogether unbranched, and its long, leathery leaves collected at the 
!nd. From amongst these rises a long, three-cornered flower-stalk, at the end of 
vhich are a few large white flowers, conspicuous for their fine red calyxes. It is said 
o inhabit close, shady places in the virgin woods of Brazil, preferring a granitic soil. 
The fragrance of its foliage is like that of the Orange, and its aromatic tonic bark is 
valuable as a remedy for the fevers of that country.* 
It need scarcely be said, that the temperature required for the successful culture 
)f this plant is a very humid stove, as its natural habitats, and other particulars 
inown respecting it, will at once point out both this and its general treatment. 
* Bot. Reg., Vol. xxix., t. 47. 
