RUTACEAE. 163 
ORIXA. 
(Family Rutaceae). 
Shrubs, glabrous: deciduous. 
Twigs moderate, more or less 3- 
sided, sometimes zig-zag: pith 
rather _ small, pale, rounded, 
spongy. Buds sessile or forming 
short spurs, solitary, ovoid with 
about 10 broad scales. Leaf-scars 
alternate, half-round or obtusely 
triangular, moderate, low: bundle- 
trace 1, C-shaped, compound: sti- 
pule-scars lacking. 
The winter-buds of Orixa, with 
the conspicuous pale margin of 
their scales, are quite unlike those 
of any other shrub or tree likely 
to be encountered. The winter- 
characters of O. japonica are pic- 
tured by Schneider, f, 97, and 
Shirasawa, 254, pl. 6. At differ- 
ent times it has been placed in 
Celastrus, Ilex and Othera. 
Like other phat een Orixa produces an essential oil in its 
various parts that gives it a characteristic odor. Sometimes, 
as in Citrus, such odors are pleasant to our senses: some- 
times, as in the rue, they are very disagreeable. Oriza is of 
the odoriferous rather than the aromatic type. 
Twigs olive: bud-scales with pale ciliate margin. O. japonica. 
