BOTANIC MATERIA MEDICA, 173 
used for tanning, and the wood for charcoal. 
Leaves contain resin, tannin, a volatile oil, an 
active principle termed boldine, and a glucoside 
named doldglucin, 0.3 per cent. Boldo is said 
to have tonic and stimulating properties, has 
been administered in form of infusion, tincture 
and fluid extract, but is considered poisonous in 
large doses. The dose of the infusion, 1 to 2 
fluid drachms;,of the tincture, 8 to 10 drops; 
used in South America as a remedy in catarrh 
of the bladder and in gonorrhoea. The Boldo 
may be classed as a new remedy and virtually 
untried, but considered by a few a valuable 
agent in the cure of disease, though not recog- 
nized as officinal. 
Buchu, Buchu, Barosma Crenata.—Natural 
order Rutacez. This small shrub or bush with 
its angular stem is adorned with pale green 
leaves, which are either oval, obovate or lance- 
_ olate in shape with serrated edges, having many 
dots or pellucid punctate points on their sur- 
faces; odor aromatic and of its own kind, taste 
pungent, mucilaginous and somewhat bitter. 
Buchu leaves contain resin, mucilage, volatile — 
oil and diosmin. The three species of Buchu 
are, the buchu betulina, buchu crenulata, and 
the buchu serratifolia; the two former species 
differing as to the leaf and form of the ovary; 
they are known in commerce as the short and 
the long Buchu. The long Buchu is lanceolate 
in shape with serrated edges, about an inch long 
and acutely pointed. The flowers of the Buchu 
are white and interlined with red; they stand 
on solitary peduncles, corolla five petalled, with 
ten stamens, five of which are sterile; calyx 
