Eucalyptus longirostrata, commonly known as grey gum,[1] is a species of tree that is endemic to south-east Queensland. It has smooth greyish bark, glossy green adult leaves that are paler on the lower surface, flower buds in groups of seven, white flowers and hemispherical to cup-shaped fruit.
Eucalyptus longirostrata is a tree that typically grows to a height of but does not form a lignotuber. It has smooth grey bark that is shed in strips. Young plants have broadly lance-shaped leaves that are paler on the lower surface, long and wide. Adult leaves are glossy green on the upper surface, paler below, lance-shaped, long and wide tapering to a channelled petiole long. The flower buds are arranged in groups of seven in leaf axils on a flattened, unbranched peduncle long, the individual buds on pedicels long. Mature buds are oval, long and wide with a long, beaked operculum. Flowering has been recorded in February and March and the flowers are white. The fruit is a woody, hemispherical to cup-shaped capsule long and wide with the valves protruding above the rim of the fruit.[2]
This grey gum was first formally described in 1934 by William Blakely who gave it the name Eucalyptus punctata var. longirostrata and published the description in his book A Key to the Eucalypts.[3] In 1988, Lawrie Johnson and Ken Hill raised the variety to species status as E. longirostrata, publishing the change in Flora of Australia.[4] The specific epithet (longirostrata) is from the Latin words longus meaning "long"[5] and rostratus meaning "beaked",[6] referring to the long, beaked operculum.
Eucalyptus longirostrata grows in open forest on hills and ridges in Queensland, between the Blackdown Tableland and the Toowoomba district.
This eucalypt is classified as "least concern" under the Queensland Government Nature Conservation Act 1992.[7] It was also listed as a least concern species with the International Union for the Conservation of Nature in 2019 with a stable, although severely fragmented, population of over 2,000 individuals.