Eucalyptus youngiana

Eucalyptus youngiana, commonly known as large-fruited mallee, Ooldea mallee and yarldarlba, is a species of mallee, less commonly a tree, that in 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.
Description.
"Eucalyptus youngiana" is a mallee that typically grows to a height of , less commonly a tree to , and forms a lignotuber. It has rough, flaky, dark grey-brown bark on part or all of the trunk and smooth, pinkish-grey to creamy bark above. Young plants and coppice regrowth have greyish green, egg-shaped to lance-shaped leaves that are long and wide. The adult leaves are the same shade of dull bluish green on both sides, lance-shaped, long and wide, tapering to a petiole long. The flower buds are arranged in leaf axils in groups of three on an unbranched peduncle long, the individual buds on pedicels long. Mature buds are oval, long and wide with a horn-shaped or beaked operculum long. Flowering occurs from June to October and the flowers are red, pink or bright yellow. The fruit is a woody, short, broad and hemispherical capsule, long and wide with coarse, longitudinal ridges. The seeds are brown, an irregular pyramid shape and long.
Taxonomy.
"Eucalyptus youngiana" was first formally described in 1876 by Ferdinand von Mueller in his book "Fragmenta phytographiae Australiae", based on specimens collected at Queen Victoria Spring by Jess Young during the Giles expedition of May 1875. The specific epithet honours Jess Young, a member of Giles's fourth expedition, who collected the type specimen.
Distribution and habitat.
The large-fruited mallee grows in sandy soil on flat country, often associated with "Triodia" species. It occurs throughout arid and semi-arid areas from north of Kalgoorlie in Western Australia through the Great Victoria Desert to Tarcoola and Bulgunnia Station in South Australia.