''Eucalyptus moderata'', also known as redwood mallee,
[ ] is a species of tree or a
mallee 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 the southwest of Western Australia. It has rough, hard, fibrous bark on some or all of the trunk, lance-shaped adult leaves, flower buds usually in groups of seven, pale yellow flowers and pendulous, urn-shaped fruit.
Description
The tree typically grows to a height of or shorter in mallee form with hard, scaly-fibrous, dark grey bark on the base of the tree which becomes a smooth white colour further up the tree.
[ It 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 ...
and has 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''), ...
branchlets. The concolorous, dull, blue-green to green adult leaves are arranged alternately. The leaf blade has a lanceolate shape with a length of and a width of with a that tapers to the 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 ...
.[ Each unbranched axillary ]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 branches. An inflorescence is categorized on the basis of the arrangement of flowers on a mai ...
usually has more than seven pedicellate buds. The mature buds have an ovoid to oblong shape with a length of and a width of . The buds are scarred with a beaked to horn shaped operculum and pale yellow flowers. After flowering, erect to pendulous fruits form that are mostly urn shaped with a length of and a width of . The fruits have a descending disc with three or four exserted valves. The brown-grey seeds within the fruit have an ovoid or flattened-ovoid shape.
Taxonomy and naming
''Eucalyptus moderata'' was first formally described in 1991 by the botanists 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 ...
and Ken Hill in the journal '' Telopea''.specific epithet
In Taxonomy (biology), taxonomy, binomial nomenclature ("two-term naming system"), also called binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin gramm ...
is taken from the Latin
Latin ( or ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally spoken by the Latins (Italic tribe), Latins in Latium (now known as Lazio), the lower Tiber area aroun ...
word ''moderatus'' meaning "moderate" in reference to the medium sized habit and leaves, buds and fruit of the plant compared to its closest relatives.[
]
Distribution
It is found on flats, slopes and road verges in the eastern Wheatbelt and the Goldfields-Esperance region growing in sandy-loamy soils over granite
Granite ( ) is a coarse-grained (phanerite, phaneritic) intrusive rock, intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly coo ...
or laterite
Laterite is a soil type rich in iron and aluminium and is commonly considered to have formed in hot and wet tropical areas. Nearly all laterites are of rusty-red coloration, because of high iron oxide content. They develop by intensive and prolo ...
.[
The species is associated with the western mallee subgroup which is characterised by several eucalypts including '' E. oleosa'', '' E. eremophila'', '' E. incrassata'', '' E. foecunda'', '' E. redunca'' and '' E. uncinata''. The understorey is predominantly shrubby with species of '']Melaleuca
''Melaleuca'' () is a genus of nearly 300 species of plants in the myrtle family, Myrtaceae, commonly known as paperbarks, honey-myrtles, bottlebrushes or tea-trees (although the last name is also applied to species of '' Leptospermum''). They ...
'' and ''Acacia
''Acacia'', commonly known as wattles or acacias, is a genus of about of shrubs and trees in the subfamily Mimosoideae of the pea family Fabaceae. Initially, it comprised a group of plant species native to Africa, South America, and Austral ...
'' along with the occasional ''Triodia
Triodia may refer to:
* ''Triodia'' (moth), a genus of moths of the family Hepialidae
* ''Triodia'' (plant), a genus of grasses in the family Poaceae
{{Genus disambiguation ...
''.
See also
* List of ''Eucalyptus'' species
References
{{Taxonbar, from=Q15397695
moderata
Endemic flora of Western Australia
Mallees (habit)
Myrtales of Australia
Eucalypts of Western Australia
Trees of Australia
Plants described in 1999
Taxa named by Lawrence Alexander Sidney Johnson
Taxa named by Ken Hill (botanist)