Corymbia maculata (syn. Eucalyptus maculata), commonly known as Spotted Gum, is a gum tree endemic to Queensland, New South Wales and Victoria. It belongs to Family Myrtaceae. It occurs on infertile and dry sites of shales and slates.
Spotted Gum is a tall tree with a straight trunk, growing up to 45 metres in height. Spotted Gum has smooth powdery bark which is white, grey or pink; often with characteristic patches (‘spots’). The name maculata is derived from the Latin word maculosus, meaning ‘spotted’. The bark is shed in polygonal flakes.
The adult leaves are lanceolate (shaped like a lance head; of a narrow oval shape tapering to a point at each end.) They are about 10 to 21 cm long and 1.5 to 3 cm wide.
The genus Corymbia is named from the Latin corymbium; a ‘corymb’ refers to the form of the flower clusters.
Spotted Gum has small, white flowers occur from late autumn to spring. The flowers are in panicles with umbels of 3, some are in umbels of 2. They are known as umbellasters of 3 or 2 flowers. The pedicel of the flower is very short, 3-6 mm long and cylindrical. The operculum (bud cap or calyptra) is hemispherical and shorter than the hypanthium. The stamens are numerous and white in colour. There are carpels in the ovary.
The fruit is ovoid or slightly urceolate (urn shaped with a swollen middle and a narrow top) in shape. Most Corymbia species have thick-walled woody fruit that are more or less urn-shaped. The dimensions of the fruit are about 10–14 mm long, 9–11 mm in diameter; disc depressed; valves enclosed.
The species is often used for planting in parks and as a street tree, however its mature size makes it unsuitable for most home backyards.
The hard and durable timber is utilised for a number of purposes including poles, posts, construction timber, panelling, joinery, tool handles, furniture, plywood, firewood and charcoal.