''Eucalyptus wyolensis'', commonly known as the Wyola mallee, is a species of mallee 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 Australia. It has rough bark on the base of the stems, smooth grey to brown bark above, heart-shaped to egg-shaped adult leaves arranged in opposite pairs, flower buds in groups of seven to eleven, pale yellow flowers and cup-shaped to barrel-shaped fruit.

Description

''Eucalyptus wyolensis'' is a mallee that typically grows to a height of and forms a lignotuber. The bark is rough and fibrous on the base of the trunk, sometimes to the larger branches, and smooth grey to brown or cream-coloured above. Young plants and coppice regrowth have stems that are square in cross-section,

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 ...

and heart-shaped, long and wide. Adult leaves are similar to the juvenile leaves, heart-shaped to egg-shaped, the same glaucous green on both sides,

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 ...

, long and wide. The flowers 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 seven, nine or eleven 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, glaucous, long and wide with a beaked operculum that is longer than the

floral cup In angiosperms, a hypanthium or floral cup is a structure where basal portions of the calyx, the corolla, and the stamens form a cup-shaped tube. It is sometimes called a floral tube, a term that is also used for corolla tube and calyx tube. It ...

. Flowering has been observed in July and the flowers are pale yellow. The fruit is a woody cup-shaped to barrel-shaped capsule long and wide with the valves protruding above the rim.

Taxonomy and naming

''Eucalyptus wyolensis'' was first formally described in 1988 by Clifford David Boomsma in the '' Journal of the Adelaide Botanic Garden'' from specimens collected west of Carle Thulka and south of Lake Wyola in 1987. 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 ...

and the common name is a reference to its occurrence near Lake Wyola in the

Great Victoria Desert The Great Victoria Desert is a sparsely populated desert ecoregion and interim Australian bioregion in Western Australia and South Australia. History In 1875, British-born Australian explorer Ernest Giles became the first European to cross th ...

Distribution and habitat

This mallee is only known from two populations between Lake Maurice and the border with Western Australia where it grows on red sandplain in the southern part of the

Conservation status

In 2019 the

International Union for the Conservation of Nature The International Union for Conservation of Nature (IUCN; officially International Union for Conservation of Nature and Natural Resources) is an international organization working in the field of nature conservation and sustainable use of natu ...

listed ''E.wyolensis'' as a

near threatened species A near-threatened species is a species which has been categorized as "Near Threatened" (NT) by the International Union for Conservation of Nature as that may be vulnerable to endangerment in the near future, but it does not currently qualify fo ...

with a stable but severely fragmented population with an estimated area of occupancy of and an estimated extent of occurrence of .

References

{{Taxonbar, from=Q15356971 wyolensis Myrtales of Australia Flora of South Australia Mallees (habit) Plants described in 1988

Description

Taxonomy and naming

Distribution and habitat

Conservation status

See also

References