MYRTACEAE. 251 
EUCALYPTUS. 
(Family Myrtaceae). 
Tender aromatic trees, often of 
large size: evergreen. Twigs at 
first slender and 4 angled or rib- 
bed, becoming terete and stout: 
pith small, more or less angular 
and flattened, spongy. Buds 
naked, very small and _ insignifi- 
cant, or the lateral like the end- 
bud elongated as filiform often 
deciduous branches. Leaf - scars 
alternate or on young wood op- 
posite, even then sometimes 2- 
ranked by torsion of the twig, half- 
round, little raised: bundle-trace 
1, large and round: stipule-scars 
lacking. Leaves simple, entire, 
pellucid-punctate, those of mature 
branches often sickle-shaped and 
standing vertically. 
Eucalyptus shares with the coni- 
ferous genus Sequoia the distinc- 
tion of producing the tallest trees known. Like many Austra- 
lian trees, it is given to producing leaves which hang with 
their edges vertical so that their surfaces are not exposed to 
the full glare of the sun. LH. globulus, which produces an ex- 
cellent timber, is one of the most rapid growing of trees, 
and its trunk, even when of large size, is willowy and yielding 
under the force of a gale. 
Outer bark loosely shredding: slender twigs, warty. 
(Blue gum). E. globulus. 
