LEAVES AND HERBS. 
209 
entire, revolute; surface light green, glabrous, with 
numerous small circular reddish-brown depressions or 
projections in the neighborhood of the stomata and 
veins, consisting of cork cells ; 1 midrib usually 
with a small groove on the dorsal side ; veins of the 
first order diverging at an angle of about 55°, running 
to within 1 mm. of the edge, where they anastomose, 
forming a vein parallel with the margin ; petiole 2 to 
3 cm. long, flattened and somewhat twisted ; pellucid 
punctate ; texture coriaceous ; odor slightly aromatic ; 
taste aromatic, somewhat bitter and cooling. 
Constituents. — Volatile oil 3 to 6 per cent., of 
which over 60 per cent, is eucalyptol ; several resins ; 
a bitter principle; tannin and calcium oxalate. 
BUCHU. 
The leaves of several species of Barosma (Fam. 
Rutacese), a shrub indigenous to Cape Colony. There 
are two chief commercial varieties : (1) Short Buchu 
obtained from B. betulina and (2) Long Buchu, obtained 
from B. serratifolia, the short buchu being preferred. 
Description. — Short Buchu. — Obovate, rhomboid-obo- 
vate or elliptical ; 9 to 18 mm. long, 6 to 12 mm. broad ; 
apex obtuse, somewhat recurved ; base acute or cune- 
ate ; margin sharply dentate and with an oil-secretion 
reservoir at the base of each tooth ; upper surface yel- 
lowish green, glabrous; under surface yellowish green, 
longitudinally striate; both surfaces papillose; petiole 
about 1 mm. long; texture coriaceous; odor and taste 
distinct, aromatic. 
Long Buchu. — Linear-lanceolate, 25 to 40 mm. long, 
4 to 6 mm. broad ; apex somewhat rounded. 
Constituents. — Short buchu contains about 1'5 per 
1 These corky patches appear to be due to an irritation caused 
by some of the constituents. 
