Eucalyptus eremophila, commonly known as the sand mallet or tall sand mallee, is a species of mallet that is endemic to semi-arid regions of Western Australia. It has smooth pale brown and greyish bark, narrow lance-shaped to elliptical adult leaves, flower buds arranged in groups of between seven and eleven with an elongated operculum, and cup-shaped to barrel-shaped fruit. Description Eucalyptus eremophila is a mallet, sometimes a shrub or a tree, that typically grows to a height of and a width of but does not form a lignotuber. It has smooth, polished pale brown to greyish bark that is shed in late summer. Young plants and coppice regrowth have glossy green, lance-shaped to oblong leaves long, wide and arranged alternately. Adult leaves are narrow lance-shaped to elliptical, long, long on a petiole long. The flower buds are arranged in leaf axils in groups of seven, nine or eleven on a flattened, unbranched peduncle long, the individual buds on a pedicel long. Mature buds are long, wide, curved spindle-shaped with an elongated, horn-shaped operculum. Flowering occurs from August to December and the flowers are lemon yellow, sometimes pale pink. The fruit is a woody, cup-shaped to barrel-shaped capsule, long, wide on a downturned pedicel, with the valve tips at rim level. Taxonomy and naming The sand mallet was first formally described in 1904 by Ludwig Diels from material collected near Boorabbin in the Coolgardie district by Ernst Georg Pritzel. Diels gave it the name Eucalyptus occidentalis var. eremophila and published the description in the journal Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie. In the same journal, Adolf Engler published the first formal description of E. occidentalis. In 1920, Joseph Maiden raised the variety to species status as E. eremophila. Two subspecies of E. eremophila are accepted by the Australian Plant Census: Eucalyptus eremophila (Diels) Maiden subsp. eremophila; Eucalyptus eremophila subsp. pterocarpa (Blakely & H.Steedman) L.A.S.Johnson & Blaxell. The specific epithet (eremophila) is derived from the Greek eremi- meaning "desert" and philos 'lover'. The eucalypt is associated with the western mallee subgroup which is characterised by several eucalypts, including E. oleosa, E. moderata, E. incrassata, E. foecunda, E. redunca and E. uncinata. The understorey is predominantly shrubby with species of Melaleuca and Acacia along with the occasional Triodia. Distribution and habitat Eucalyptus eremophila is found on undulating plains, hills and sand dunes in the Wheatbelt and Goldfields-Esperance region of Western Australia where