Eucalyptus tetrodonta

Eucalyptus tetrodonta, commonly known as Darwin stringybark or messmate, and known to the Yolngu peoples of Arnhem Land as gaḏayka, meaning "the word" or "message", is a species of medium-sized to tall tree that is endemic to northern Australia. It has rough, stringy or fibrous bark on the trunk and branches, lance-shaped leaves arranged in opposite pairs, flowers buds in groups of three, whitish to cream-coloured flowers and cylindrical fruit.