''Eucalyptus yilgarnensis'', commonly known as yorrell or yorrel, is a species of mallee, rarely a small 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 Western Australia. It usually has rough bark on the trunk, smooth bark above, linear to narrow elliptical or narrow lance-shaped adult leaves, flower buds in groups of seven or nine, white flowers and barrel-shaped fruit.

Description

''Eucalyptus yilgarnensis'' is a mallee or tree that typically grows to a height of up to and forms a lignotuber. It usually has rough, fibrous brown bark, smooth grey to brown bark above, sometimes smooth bark throughout. Young plants and coppice regrowth have dull bluish grey, narrow elliptical, lance-shaped or egg-shaped leaves that are long and wide and

petiolate 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, a ...

. Adult leaves are the same shade of glossy green on both sides, linear to narrow elliptical or narrow lance-shaped, long and wide, tapering to a petiole long. The flowers 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 seven or nine on an unbranched peduncle long, the individual buds on

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 ...

long. Mature buds are oval or pear-shaped, long and wide with a rounded to conical operculum long. Flowering occurs from April to November and the flowers are white. The fruit is a woody, barrel-shaped capsule long and wide with the valves below rim level.

Taxonomy and naming

Yorrell was first formally described in 1919 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 ...

who published the description in '' Journal and Proceedings of New South Wales'' and gave it the name ''Eucalyptus gracilis'' var. ''yilgarnensis''. In 1986, Ian Brooker raised the variety to species status as ''E. yilgarnensis''.

Distribution and habitat

''Eucalyptus yilgarnensis'' grows on sandy soil in low, open woodland between

Wongan Hills Wongan Hills is a range of low flat-topped hills in the Avon Wheatbelt bioregion of Western Australia. It is located at , in the Shire of Wongan–Ballidu. History The range was first recorded in 1836 by Surveyor General of Western Australia Jo ...

Kalgoorlie Kalgoorlie is a city in the Goldfields–Esperance region of Western Australia, located east-northeast of Perth at the end of the Great Eastern Highway. It is sometimes referred to as Kalgoorlie–Boulder, as the surrounding urban area includ ...

, Zanthus, Balladonia and Salmon Gums. Associated species in the woodland overstorey include '' E. salubris'' and '' E. salmonophloia'' and sometimes '' E. melanoxylon'' and '' E. oleosa''. Plants found in the understorey shrubs include '' Acacia colletioides'', ''

Atriplex vesicaria ''Atriplex vesicaria'', commonly known as bladder saltbush, is a species of flowering plant of the family ''Amaranthaceae'' and is endemic to arid and semi-arid inland regions of Australia. It is an upright or sprawling shrub with scaly leaves a ...

'', '' A. paludosa'', '' Melaleuca hamulosa'', ''

Regelia cymbifolia ''Regelia cymbifolia'' is a plant in the myrtle Family (biology), family, Myrtaceae and is Endemism, endemic to the South West (Western Australia), south-west of Western Australia. It is a much branched shrub bearing tiny, wedge shaped leaves and ...

'', ''

Exocarpos aphyllus ''Exocarpos aphyllus'' (common name leafless ballart) belongs to the sandalwood plant family (Santalaceae). Retrieved 21 August 2019. Noongar names are chuk, chukk, dtulya and merrin. It is a species endemic to Australia. Uses Noongar (south-w ...

'' and '' Grevillea acuaria''.

Conservation status

This eucalypt is classified as "not threatened" by the Western Australian Government

Department of Parks and Wildlife The Department of Parks and Wildlife (DPaW) was the department of the Government of Western Australia responsible for managing lands described in the ''Conservation and Land Management Act 1984'' and implementing the state's conservation and e ...

References

{{Taxonbar, from=Q15357014 yilgarnensis Endemic flora of Western Australia Mallees (habit) Myrtales of Australia Eucalypts of Western Australia Trees of Australia Plants described in 1919 Taxa named by Ian Brooker Taxa named by Joseph Maiden

Description

Taxonomy and naming

Distribution and habitat

Conservation status

See also

References