There are more than 600 species of the eucalyptus tree making up 75% of the tree flora in Australia. Governor Arthur Philip is credited with being the first to call the eucalypt a ‘gum tree’ in 1788. Aborigines used the gum exuded from the trees to fasten barbs to the ends of spears and fishing sticks. An adult koala eats between 200 to 500g of leaves each day. Eucalyptus oil is readily steam distilled from the leaves and can be used for cleaning, as an antiseptic, as an insect repellent, and in food supplements, especially sweets, cough drops, toothpaste and decongestants.