''Eucalyptus rubida'', commonly known as candlebark, ribbon gum or white gum, is a species of small to medium-sized tree that is

endemic Endemism is the state of a species being found 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 found elsew ...

to south-eastern

Australia Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...

. It has smooth bark, sometimes with rough bark at the base, lance-shaped or curved adult leaves, flower buds in groups of three, white flowers and cup-shaped, hemispherical or bell-shaped fruit.

Description

''Eucalyptus rubida'' 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 response t ...

. It has smooth, powdery, greyish or pink bark that is shed in long ribbons but there is sometimes persistent fibrous bark near the base of the trunk. Young plants and

coppice Coppicing is a traditional method of woodland management which exploits the capacity of many species of trees to put out new shoots from their stump or roots if cut down. In a coppiced wood, which is called a copse, young tree stems are repeated ...

regrowth have

sessile Sessility, or sessile, may refer to: * Sessility (motility), organisms which are not able to move about * Sessility (botany), flowers or leaves that grow directly from the stem or peduncle of a plant * Sessility (medicine), tumors and polyps that ...

glaucous ''Glaucous'' (, ) is used to describe the pale grey or bluish-green appearance of the surfaces of some plants, as well as in the names of birds, such as the glaucous gull (''Larus hyperboreus''), glaucous-winged gull (''Larus glaucescens''), g ...

, more or less round leaves wide arranged in opposite pairs. Adult leaves are arranged alternately, lance-shaped to curved, long and wide, tapering to a petiole long. The flower buds are arranged in leaf

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

s in groups of three on an unbanched peduncle, the individual buds sessile or an

pedicels In botany, a pedicel is a stem that attaches a single flower to the inflorescence. Such inflorescences are described as ''pedicellate''. Description Pedicel refers to a structure connecting a single flower to its inflorescence. In the absenc ...

up to long. Mature buds are oval to spindle-shaped, long and wide with a conical to rounded operculum. Flowering mainly occurs from December to April and the flowers are white. The fruit is a woody cup-shaped, hemispherical or bell-shaped capsule long and wide with the valves near rim level or protruding slightly.

Taxonomy and naming

''Eucalyptus rubida'' was first formally described in 1899 by Henry Deane and

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 suc ...

''. The

specific epithet In taxonomy, binomial nomenclature ("two-term naming system"), also called nomenclature ("two-name naming system") or binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, bot ...

(''rubida'') is from the

Latin Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power of the ...

word ''rubidus'' meaning "red", referring to the seasonally red bark. In 1991,

Lawrie Johnson Lawrence Alexander Sidney Johnson Fellow of the Australian Academy of Science, FAA, (26 June 1925 – 1 August 1997) known as Lawrie Johnson, was an Australian Taxonomy (biology), taxonomic botany, botanist. He worked at the Royal Botanic Garden ...

and Ken Hill described two subspecies and the names are accepted by the

Australian Plant Census The Australian Plant Census (APC) provides an online interface to currently accepted, published, scientific names of the vascular flora of Australia, as one of the output interfaces of the national government Integrated Biodiversity Information Syst ...

as at December 2019: * ''Eucalyptus rubida'' subsp. ''barbigerorum'' L.A.S.Johnson & K.D.Hill, commonly known as blackbutt candlebark, has elliptic juvenile leaves and a trunk with thick, rough bark at the base; * ''Eucalyptus rubida'' H.Deane & Maiden subsp. ''rubida'' has round juvenile leaves and smooth bark to ground level.

Distribution and habitat

Candlebark grows in woodland and forest, usually in shallow soils on tablelands, hills and slopes. Subspecies ''barbigerorum'' occurs on the

Northern Tablelands The Northern Tablelands, also known as the New England Tableland, is a plateau and a region of the Great Dividing Range in northern New South Wales, Australia. It includes the New England Range, the narrow highlands area of the New England regio ...

north of

Armidale Armidale is a city in the Northern Tablelands, New South Wales, Australia. Armidale had a population of 24,504 as of June 2018. Estimated resident population, 30 June 2018. It is the administrative centre for the Northern Tablelands region. It ...

. Subspecies ''rubida'' occurs on the

Southern Tablelands The Southern Tablelands is a Regions of New South Wales, geographic area of New South Wales, Australia, located south-west of Sydney and west of the Great Dividing Range. The area is characterised by Plateau, high, flat country which has gene ...

of New South Wales, mainly on the northern side of the

Great Dividing Range The Great Dividing Range, also known as the East Australian Cordillera or the Eastern Highlands, is a cordillera system in eastern Australia consisting of an expansive collection of mountain ranges, plateaus and rolling hills, that runs rough ...

in Victoria, between

Halls Gap Halls Gap is a town in Victoria, Australia. It is located on Grampians Road, adjacent to the Grampians National Park, in the Shire of Northern Grampians local government area. The town is set in the Fyans Valley at the foot of the Wonderland a ...

and

Delegate Delegate or delegates may refer to: * Delegate, New South Wales, a town in Australia * Delegate (CLI), a computer programming technique * Delegate (American politics), a representative in any of various political organizations * Delegate (Unit ...

, and on the tablelands and mountain slopes of eastern Tasmania.

Conservation status

Subspecies ''barbigerorum'' is classified as "vulnerable" under the Australian Government ''

Environment Protection and Biodiversity Conservation Act 1999 The ''Environment Protection and Biodiversity Conservation Act 1999'' (Cth) is an Act of the Parliament of Australia that provides a framework for protection of the Australian environment, including its biodiversity and its natural and cultu ...

''. The main threats to the subspecies are habitat disturbance caused by agriculture, development and road work and by timber collection.

References

{{Taxonbar, from=Q2070107 rubida Myrtales of Australia Flora of the Australian Capital Territory Flora of New South Wales Flora of Victoria (Australia) Flora of Tasmania Trees of Australia Plants described in 1899

Description

Taxonomy and naming

Distribution and habitat

Conservation status

See also

References