Eucalyptus youngiana, commonly known as large-fruited mallee, Ooldea mallee and yarldarlba, is a species of mallee, less commonly a tree, that is native to arid and semi-arid areas of southern Western Australia and South Australia. It has rough, fibrous bark on some or all of the trunk, smooth bark above, lance-shaped adult leaves, flower buds in groups of three, red, pink or bright yellow flowers and short, broad, conical fruit.

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