Common Name: Yellow Bloodwood

General Information

Corymbia eximia is an evergreen tree that can grow up to 20 metres tall[].
The tree is harvested from the wild for local use as a medicine. It is often grown as an ornamental.

Known Hazards

None known

Botanical References

,

Range

Australia - eastern New South Wales

Habitat

Locally abundant, in dry sclerophyll woodland on shallow infertile soils on sandstone, often on steep slopes[].

Properties

Medicinal Rating
Other Uses Rating
Habit	Evergreen Tree
Height	15.00 m
Pollinators	Bees, Insects
Cultivation Status	Ornamental, Wild

Cultivation Details

Corymbia eximia is native to the warm temperate climate of eastern Australia
Eucalyptus species generally require a sunny position, succeeding in a wide range of well-drained, circumneutral soils of low to moderate fertility[].
The plant develops a lignotuber - this is a woody tuber that starts to develop near the base of seedlings and can become massive in the mature plants of some species. It possesses embedded vegetative buds, allowing the plant to regenerate following crown destruction, for example by fire[].
A highly ornamental plant, especially when in flower, it is occasionally planted as a street or parkland tree. It deserves to be more widely used as it is highly attractive to flower feeding insects and birds[].
Eucalyptus species have not adopted a deciduous habit and continue to grow until it is too cold for them to do so. This makes them more susceptible to damage from sudden cold snaps. If temperature fluctuations are more gradual, as in a woodland for example, the plants have the opportunity to stop growing and become dormant, thus making them more cold resistant. A deep mulch around the roots to prevent the soil from freezing also helps the trees to survive cold conditions[]. Many members of this genus are remarkably adaptable however, and there can be a dramatic increase in the hardiness of subsequent generations from the seed of survivors growing in temperate zones[].

Edible Uses

None known

Medicinal

Kino resin, obtained in small quantities from the trunk, is very astringent. Diluted, it can be taken internally as an effective treatment for dysentery, working because it is not absorbed at all from the stomach and only very slowly from the intestine, and is thus able to directly treat the lower part of the intestine. It can be used as a gargle and mouthwash to treat relaxed throat, loose teeth[, ].
Applied externally as a wash, it is an effective styptic and can used to treat cuts and skin problems[]

Other Uses

An essential oil is obtained from the leaves. Total quantity of the oil, and its composition, can vary widely from plant to plant, but we have reports that the fresh leaves contain around 0.5 - 1.0% essential oil. The main components include alpha-pinene (around 33%), eudesmol (around 35%) and globulol[].

A small quantity of kino resin is obtained from the trunk. Kino resins are rich in tannins and are very astringent. Soluble in water, they can be used medicinally; in tanning; as well as for preserving and dyeing natural fibres. When boiled in an iron pot they produce a thick, dark liquid that can be used as an ink[].
The resin oozes naturally from wounds in the trunk and can be tapped by making incisions in the bark. At first it is a thick liquid, but soon hardens upon exposure to the air and sun, typically drying to an amber-like material that consists of dark red angular fragments, rarely larger than a pea. Freshly exuded kino is more effective than kino that has been on the tree for a long while, since the soluble portion can be more or less washed out and the action of the sun can alter their chemical composition[].

Propagation

Seed - surface sow late winter/early spring in a sunny position in a greenhouse[, , ]. Species that come from high altitudes appreciate 6 - 8 weeks cold stratification at 2°c[]. Pot up the seedlings into individual pots as soon as the second set of seed leaves has developed, if left longer than this they might not move well. Plant out into their permanent positions in early summer and give them some protection from the cold in their first winter. The seed can also be sown in early summer, the young trees being planted in their final positions in late spring of the following year. The seed has a long viability[].