606 
LI. MORTAGE;®. 
[ An;/op)iora. 
Both the living tree and the timber somewhat resemble in appearance the Spotted Gum. 
Eucalyptus maculata , and the latter has been used in mistake for it; but if exposed to the 
weather, the Angophora wood soon perishes. 
Gum contains 33 - 3% of tannin ; resin, 5%. Laulerer. 
Dr. Joseph Lauterer remarks that the tan-resin gums of Myrtacete are entirely endemic in 
Australia, no plant of other countries yielding an exudation similar to them in chemical 
composition. 
15. EUCALYPTUS, Lher. 
(Alluding to the lid, which is formed of the corolla and calyx-lobes, well covering 
the organs of reproduction during the early stage of their growth.) 
(Eudesmia, 11. Br. Symphyomyrtus, Scliau.) 
Calyx-tube obconical campanulate or oblong, adnate to the ovary at the base 
or rarely to the top, truncate and entire after the falling off of the operculum or 
with 4 minute teeth ; the orifice closed by a hemispherical conical or elongated 
operculum covering the stamens in the bud and falling off entire when the 
stamens expand, this operculum usually simple (formed of the concrete petals ?), 
thin or more frequently thick, fleshy or woody, the veins longitudinal, numerous 
and parallel or rarely anastomosing, the separation from the calyx-tube usually 
but not always marked in the bud by a distinct line ; there is also frequently in 
the very young bud a very thin membranous external operculum more continuous 
with the calyx-tube and very rarely this external one persists nearly as long as 
the internal one and is as thick or nearly so. Stamens numerous, in several 
series, free or very rarely very shortly united at the base into 4 clusters ; anthers 
versatile or attached at or close to the base, the cells parallel and distinct or 
divergent and confluent at the apex, opening in longitudinal slits or rarely in 
terminal pores, the connective often thickened into a small gland either separating 
the cells or behind them when they are contiguous. Ovary inferior, the summit 
glabrous, flat, convex or conical, 8 to 6-celled, with numerous ovules in each cell, 
in 2 to 4 rows, on an adnate or oblong and peltate axile placenta ; style subulate 
or rarely almost clavate, with a small truncate capitate or rarely peltate stigma. 
Fruit consisting of the more or less enlarged truncate calyx-tube enclosing the 
capsule, usually of a hard and woody texture and interspersed with resinous 
receptacles, the persistent disk usually thin and lining the orifice of the calyx- 
tube when the capsule is deeply sunk ; concave, horizontal, convex, or conically 
projecting, and more or less contracting the orifice when the capsule is not 
much shorter than, as long as, or longer than the calyx-tube ; the capsule always 
adnate to the calyx-tube although often readily separable from it when quite ripe 
and dry, very rarely protruding from the orifice left by the disk before maturity, 
but opening at the apex in as many valves as there are cells, which often protrude, 
especially when acuminate by the persistent and split base of the style. Seeds 
for the greater part abortive but more or less enlarged, variously shaped and of a 
hard apparently uniform texture, one or very few in each cell perfect, usually 
ovoid or flattened and ovate when solitary, variously shaped and angular when 
more than one ripen ; testa black, dark coloured, or rarely pale, smooth or 
granular, not hard, in a few species expanded into a variously- shaped wing ; 
hilum ventral or lateral. Embryo with broad cordate 2-lobed or bipartite 
cotyledons, folded over the straight radicle but otherwise flat. — Shrubs or trees, 
attaining sometimes a gigantic size, secreting more or less of resinous gums, 
whence their common appellation of (rum-trees. Leaves in the young saplings of 
many species, and perhaps all in some species, horizontal, opposite, sessile, and 
cordate, in the adult shrub or tree of most species vertical (or sometimes 
horizontal), alternate, petiolate and passing more or less from broadly ovate to 
lanceolate acuminate and falcate, always rigid whether thick or thin, penniveined, 
the midrib conspicuous ; the primary veins often scarcely perceptible when the 
leaves are thick ; in some species few, irregular, oblique, and anastomosing and 
