ANGUSTURA. 33 
yield a strong odour greatly resembling tobacco, from which 
the name Orayuri is derived, from yuri, tobacco. Flowers 
numerous, white, and having a peculiar odour, on longish 
spikes, which are both terminal and axillary. Bractee lanceolate, 
acute, in pairs. 
GrocraPHicaL Distrisution.—South America, the neigh- 
bourhood of the Orinoco; Carony ; Sumeremo; Uri; Alba Grecia; 
and Cupapui, in Columbian Guiana. It grows in abundance in 
the neighbourhood of St. Joaquin de Carony, between seven 
and eight degrees of North latitude. It delights in a rich soil, 
and flourishes at the height of 600 to 1000 feet above the level 
of the sea. 
Parts useD 1N Mepictnz, AnD Mover oF PREPARATION.— 
The Bark. It is imported into this country in flat pieces or 
incomplete quills, from two to eight inches long, between half 
an inch and an inch and a half in breadth, from half a line to 
three lines in thickness, and composed of the epidermis and 
proper bark. Its external surface is dirty greyish yellow in 
colour, often speckled in the smaller pieces with lighter grey 
spots and elevations; the inner surface is dull brown, and the 
substance of the bark is yellowish brown. The transverse 
fracture is smooth and somewhat resinous in character. Powder 
greyish yellow, something like rhubarb; it has a peculiar 
odour, and a bitter, aromatic, hot taste ; it imparts its properties 
to water, alcohol, and proof-spirit. It used to be adulterated 
abroad pretty considerably with what was supposed to be the 
bark of the Brucea ferruginea or antidysenterica, but which is 
now known to have been that of the Strychnos nux vomica, and 
many fatal accidents occurred from its use. The spurious bark, 
besides not being so speckled, is much thicker, more twisted, 
like dried horn, and arched backwards ; the taste is much more 
bitter, without either aroma or pungency; the inner surface is 
not separable into lamine, and the transverse fracture is rendered 
blood-red when touched by nitric acid) Hahnemann orders 
fifty grains of the powder of the Angustura bark to be mixed with 
