Corymbia Clavigera
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''Corymbia clavigera'', commonly known as apple gum or cabbage gum, is a species of 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 a small area in the north-west
Kimberley Kimberly or Kimberley may refer to: Places and historical events Australia Queensland * Kimberley, Queensland, a coastal locality in the Shire of Douglas South Australia * County of Kimberley, a cadastral unit in South Australia Ta ...
region of Western Australia. It has smooth, pale grey and white bark, lance-shaped or elliptical adult leaves, flower buds in groups of three or seven, white flowers and urn-shaped to barrel-shaped fruit.


Description

''Corymbia clavigera'' 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 smooth white to pale grey over nearly all of the trunk, sometimes with a partially thin, rough and irregularly flaky-tessellated at the base of the trunk. The adult leaves are arranged alternately, the same shade of dull green on both sides, lance-shaped or elliptical, long and wide with a pointed apex and the base tapering to 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 ...
long. The flower buds are arranged 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 branched peduncle up to long, each branch of the peduncle with three or seven buds on
pedicels In botany, a pedicel is a stem that attaches a single flower to the inflorescence In botany, an inflorescence is a group or cluster of flowers arranged on a plant's Plant stem, stem that is composed of a main branch or a system of branch ...
long. Mature buds are oval to pear-shaped, about long and wide with a rounded operculum. Flowering occurs from September to October and the flower are white. The fruit is an urn-shaped or barrel-shaped capsule long and wide on a pedicel long with a descending disc and three valves enclosed in the fruit.


Taxonomy

The species was first formally described in 1843 by the botanist
Johannes Conrad Schauer Johannes Conrad Schauer (16 February 1813 – 24 October 1848) was a botanist interested in spermatophytes. He was born in Frankfurt am Main and attended the gymnasium of Mainz from 1825 to 1837. For the next three years he worked at the Hofgar ...
as ''Eucalyptus clavigera'' from an unpublished description by Allan Cunningham. Schauer's description was published in
Wilhelm Gerhard Walpers Wilhelm Gerhard Walpers (26 December 1816 in Mühlhausen – 18 June 1853 in Berlin) was a German botanist. This botanist is denoted by the author abbreviation when citing a botanical name. He received his education at the Universities of Greif ...
book ''Repertorium Botanices Systematicae''. Cunningham collected 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. * ...
specimens in 1820 at
Careening Bay Coronation Island, also known as Garlinju, is located off the Kimberley coast of Western Australia. It encompasses an area of . It is located off Port Nelson in the Bonaparte Archipelago, as a part of the group of islands known as the Coronatio ...
and Port Nelson during the voyage of and it was collected there again in 1984 by Kevin Kenneally in an area he described as "on basalt slope behind the beach". It was reclassified as ''Corymbia watsoniana'' in 1995 by Kenneth Hill and
Lawrence Alexander Sidney Johnson Lawrence Alexander Sidney Johnson (26 June 1925 – 1 August 1997) known as Lawrie Johnson, was an Australian Taxonomy (biology), taxonomic botany, botanist. He worked at the Royal Botanic Gardens, Sydney, for the whole of his professional car ...
in the journal '' Telopea''.


Distribution and habitat

''Corymbia clavigera'' is only known with certainty from the type location in coastal areas of the Kimberley region of Western Australia. It is also likely to be growing on nearby off-shore islands and in areas of the
Carson River The Carson River is a northwestern Nevada river that empties into the Carson Sink, an endorheic basin. The main stem of the river is long although the addition of the East Fork makes the total length , traversing five counties: Alpine Count ...
volcanics between Port Warrender and the Mitchell Plateau.


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 en ...
.


See also

* List of ''Corymbia'' species


References

{{Taxonbar, from=Q15397005 clavigera Myrtales of Australia Flora of Western Australia Plants described in 1843