''Eucalyptus dunnii'', commonly known as Dunn's white gum or simply white gum, is a species of medium-sized to tall tree that is

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

to eastern Australia. It has rough bark near the base, smooth white to cream-coloured bark above, lance-shaped to curved adult leaves, flower buds in groups of seven, white flowers and cup-shaped, conical or hemispherical fruit. Eucalyptus dunnii buds

Description

''Eucalyptus dunnii'' is a tree that typically grows to a height of and forms a

lignotuber A lignotuber is a woody swelling of the root crown possessed by some plants as a protection against destruction of the plant stem, such as by fire. Other woody plants may develop basal burls as a similar survival strategy, often as a respons ...

. It has rough, greyish, corky, fibrous or flaky bark on the lower part of the trunk, smooth white or grey bark above that is shed in short ribbons. Young plants and

coppice Coppicing is the traditional method in woodland management of cutting down a tree to a tree stump, stump, which in many species encourages new Shoot (botany), shoots to grow from the stump or roots, thus ultimately regrowing the tree. A forest ...

regrowth have egg-shaped to elliptical or almost round leaves that are long and wide, arranged in opposite pairs. Adult leaves are arranged alternately, lance-shaped to curved, the same glossy green on both sides, long and wide on a

petiole Petiole may refer to: *Petiole (botany), the stalk of a leaf, attaching the blade to the stem *Petiole (insect anatomy) In entomology, petiole is the technical term for the narrow waist of some hymenopteran insects, especially ants, bees, and ...

wide. The flower buds are arranged in groups of seven in leaf

axil A leaf (: leaves) is a principal appendage of the stem of a vascular plant, usually borne laterally above ground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, stem, fl ...

s on a flattened, unbranched peduncle long, the individual buds on a

pedicel Pedicle or pedicel may refer to: Human anatomy *Pedicle of vertebral arch, the segment between the transverse process and the vertebral body, and is often used as a radiographic marker and entry point in vertebroplasty and kyphoplasty procedures ...

long. Mature buds are oval, long and wide with a beaked, conical or rounded operculum. The flowers are white and the fruit is a woody cup-shaped, conical or hemispherical capsule long and wide with the valves reaching past the level of the rim.

Taxonomy and naming

''Eucalyptus dunnii'' was first described in 1905 by

Joseph Maiden Joseph Henry Maiden (25 April 1859 – 16 November 1925) was a botanist who made a major contribution to knowledge of the Australian flora, especially the genus ''Eucalyptus''. This botanist is denoted by the author abbreviation when citing ...

in ''

Proceedings of the Linnean Society of New South Wales The Linnean Society of New South Wales promotes ''the Cultivation and Study of the Science of Natural History in all its Branches'' and was founded in Sydney, New South Wales (Australia) in 1874 and incorporated in 1884. History The Society succ ...

'' from a specimen collected by William Dunn at "Acacia Creek, Macpherson Range". The

specific epithet In Taxonomy (biology), taxonomy, binomial nomenclature ("two-term naming system"), also called binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin gramm ...

(''dunnii'') honours the collector of the

type Type may refer to: Science and technology Computing * Typing, producing text via a keyboard, typewriter, etc. * Data type, collection of values used for computations. * File type * TYPE (DOS command), a command to display contents of a file. * ...

specimen.

Distribution and habitat

Dunn's white gum has a scattered and restricted distribution in wet forest north from Dorrigo and

Coffs Harbour Coffs Harbour, locally nicknamed Coffs, is a coastal city on the Mid North Coast of New South Wales, Australia, north of Sydney, and south of Brisbane. It is one of the largest urban centres on the North Coast, with a population of 78,759 a ...

in New South Wales to

Warwick Warwick ( ) is a market town, civil parish and the county town of Warwickshire in the Warwick District in England, adjacent to the River Avon, Warwickshire, River Avon. It is south of Coventry, and south-east of Birmingham. It is adjoined wit ...

and

Canungra Canungra is a rural town and locality in the Scenic Rim Region of South East Queensland, Australia. In the , Canungra had a population of 1,436 people. Geography Located in South East Queensland, Canungra is situated in the Gold Coast hinte ...

in Queensland.

References

{{Taxonbar, from=Q15397208 dunnii Myrtales of Australia Flora of New South Wales Trees of Australia Plants described in 1905 Taxa named by Joseph Maiden