Common Name: Gum Coolibah
Eucalyptus intertexta is an evergreen tree usually growing 5 - 20 metres tall but exceptionally to 30 metres. The bole can reach a diameter of 100cm[
]. When growing on poorer sites the tree is often reduced to a shrub a few metres tall[
The seeds were sometimes consumed by the native Aborigines, though it is doubtful they are eaten nowadays. The wood is also sometimes used locally.
Citronellal, an essential oil found in most Eucalyptus species is reported to be mutagenic when used in isolation[
In large doses, oil of eucalyptus, like so many essential oils has caused fatalities from intestinal irritation[
]. Death is reported from ingestion of 4 - 24 ml of essential oils, but recoveries are also reported for the same amount[
]. Symptoms include gastroenteric burning and irritation, nausea, vomiting, diarrhoea, oxygen deficiency, ,weakness, dizziness, stupor, difficult respiration, delirium, paralysis, convulsions, and death, usually due to respiratory failure[
Australia - South Australia, New South Wales, Queensland, Northern Territory, Western Australia.
Forming a very open woodland, it is found on the higher parts of extensive plains, from which flood water is shed, and in drier areas; it is also found on flats and in broad valleys[
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Eucalyptus intertexta is a plant of arid areas from the warm temperate zone to the tropics, where it is found at elevations up to 1,250 metres. It grows best in areas where annual daytime temperatures are within the range 28 - 38°c, but can tolerate 10 - 42°c[
]. Plants tolerate 10 - 15 frosts a year in the wild, though fresh young growth can be killed by temperatures of -1°c or lower, whilst temperatures down to -7°c will kill even the dormant plant[
]. It prefers a mean annual rainfall in the range 300 - 600mm, but tolerates 150 - 700mm[
Prefers a sunny position[
]. Prefers a well-drained, light to medium soil, tolerating conditions of low fertility[
]. Plants can tolerate a severe dry season of 8 months in the wild[
].Prefers a pH in the range 6 - 7, tolerating 5.5 - 8.8[
Annual wood production potential is 4 - 5 m3/ha[
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. The members of this genus are remarkably adaptable however, there can be a dramatic increase in the hardiness of subsequent generations from the seed of survivors growing in temperate zones[
Eucalyptus monocultures are an environmental disaster, they are voracious, allelopathic and encourage the worst possible attitudes to land use and conservation[
Seeds - ground into a powder[
The heartwood is red; the narrow band of sapwood is white. The wood is hard, heavy, moderately durable in the ground and with a very interlocked grain. It is used for farm construction[
The wood is used for fuel[
Seed - surface sow in a sunny position and make sure the compost is not allowed to dry out[
]. 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. The seedlings are ready for planting in the field when they are 25 - 30 cm tall, usually after 3 - 4 months.
The seed has a long viability[
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