Eucalyptus leptophylla, commonly known as the march mallee, slender-leaved red mallee or narrow-leaved red mallee, is a tree native to inland Australia. The mallee typically grows to 6 metres (20 ft) can grow to as high as 10 metres (33 ft) and has smooth grey bark that is persistent on the lower trunk that becomes a red-brown colour higher. The bark sheds in short ribbons. Adult leaves disjunct, green, glossy and concolorous they have a linear or narrow-lanceolate with a blade that is 5 to 8 centimetres (2.0 to 3.1 in) long and 0.5 to 1 cm (0.20 to 0.39 in) wide. It blooms between March and August and produces cream-white flowers. The umbellasters are 7 to 13-flowered with a terete peduncle that is 0.6 to 1 cm (0.24 to 0.39 in) long and terete pedicels. Later it will form hemispherical or