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''Eucalyptus striaticalyx'', commonly known as Cue York gum or kopi gum, is a species of tree or mallee that is endemic to Western Australia. It has thick, rough, fibrous bark on the trunk and larger branches, lance-shaped adult leaves, flower buds in groups of between seven and thirteen, creamy white flowers and conical to cup-shaped fruit.
''Eucalyptus striaticalyx'', commonly known as Cue York gum or kopi gum, is a species of tree or mallee that is endemic to Western Australia. It has thick, rough, fibrous bark on the trunk and larger branches, lance-shaped adult leaves, flower buds in groups of between seven and thirteen, creamy white flowers and conical to cup-shaped fruit.
Description
''Eucalyptus striaticalyx'' is a tree or a mallee that typically grows to a height of . It has persistent thick, rough fibrous, dark greyish bark over most of the trunk, smooth and creamy brown to pinkish bark above. Young plants have bluish green, egg-shaped to broadly lance-shaped leaves that are long and wide. Adult leaves are the same shade of dull grey-green to blue-green on both sides, lance-shaped, long and wide, the base tapering to a petiole long. The flower buds are arranged in leafaxil
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 between seven and thirteen on an unbranched peduncle Peduncle may refer to:
*Peduncle (botany), a stalk supporting an inflorescence, which is the part of the shoot of seed plants where flowers are formed
*Peduncle (anatomy), a stem, through which a mass of tissue is attached to a body
**Peduncle (art ...
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, long and wide with a beaked operculum about the same length as 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 occurs in most months and the flowers are creamy white.
Taxonomy
''Eucalyptus striaticalyx'' was first formally described in 1904 by the botanist William Vincent Fitzgerald in the ''Journal of the West Australian Natural History Society
The Royal Society of Western Australia (RSWA) promotes science in Western Australia.
The RSWA was founded in 1914. It publishes the ''Journal of the Royal Society of Western Australia'', and has awarded the Medal of the Royal Society of Western ...
''. 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 ...
is taken from the Latin words ''striatus'' meaning "striated" and ''calyx'', in reference to the operculum.
In 1997, Dean Nicolle
270px, Dean Nicolle and '' Eucalyptus deanei''
Dean Nicolle (born 1974), is an Australian botanist, arborist and ecologist. He is widely recognised as the leading authority on the genus ''Eucalyptus''.
Nicolle was born in Adelaide, South Austr ...
described two subspecies of ''E. striaticalyx'' and the names have been accepted by the Australian Plant Census:
* ''Eucalyptus striaticalyx'' subsp. ''delicata'' D.Nicolle, distinguished by its depauperate habit, narrower leaves, smaller flower buds and fruit than the autonym;
* ''Eucalyptus striaticalyx'' W.Fitzg. subsp. ''striaticalyx''.
The tree belongs in subgenus ''Symphyomyrtus'' section ''Dumaria'' to a large sub-group, series ''Rufispermae'', composed of 37 described species and subspecies including '' E. kondininensis'', '' E. gypsophila'' and '' E. repullulans''.
Distribution
Cue York gum is found on dunes near salt lakes, low hills and drainage lines and has a scattered distribution throughout the northern Goldfields-Esperance region of Western Australia from near Meekatharra to nearKalgoorlie
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 ...
, where it grows in powdery loam soils. Subspecies ''delicata'' has a more restricted distribution around Lake Annean and Lake Austin
Lake Austin, formerly Lake McDonald, is a water reservoir on the Colorado River in Austin, Texas. The reservoir was formed in 1939 by the construction of Tom Miller Dam by the Lower Colorado River Authority. Lake Austin is one of the seven High ...
.
Conservation status
This eucalypt is classified as "not threatened" by the Western Australian GovernmentDepartment 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 ...
.
See also
* List of ''Eucalyptus'' speciesReferences
{{Taxonbar, from=Q15356079 Eucalypts of Western Australia Trees of Australia striaticalyx Myrtales of Australia Plants described in 1904 Taxa named by William Vincent Fitzgerald