Eucalyptus lansdowneana, commonly known as the Crimson mallee or the Red-Flowered mallee box, is a slender stemmed, straggly mallee with smooth grey over creamy-white bark. Adult leaves are stalked, lanceolate to broad lanceolate, to 15 x 3 cm, glossy, green to yellow-green.
Red and pinkish-red flowers appear in late winter to mid spring.
Distribution is limited to the rocky hills of the Gawler Range, Eyre Peninsula, South Australia .
The name lansdowneana was previously also applied to another species of lower Eyre Peninsula and Kangaroo Island; this is the distantly mallee species, E. albopurpurea, with white, pink or mauve flowers and which is grown widely as an ornamental, particularly in Perth. The true E. lansdowneana is a beautiful, slender mallee with large, glossy leaves and red flowers.