''Melaleuca agathosmoides'' is a shrub in the myrtle

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

Myrtaceae Myrtaceae, the myrtle family, is a family of dicotyledonous plants placed within the order Myrtales. Myrtle, pōhutukawa, bay rum tree, clove, guava, acca (feijoa), allspice, and eucalyptus are some notable members of this group. All speci ...

and 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 a small area in the

south-west The points of the compass are a set of horizontal, radially arrayed compass directions (or azimuths) used in navigation and cartography. A compass rose is primarily composed of four cardinal directions—north, east, south, and west—each se ...

Western Australia Western Australia (commonly abbreviated as WA) is a state of Australia occupying the western percent of the land area of Australia excluding external territories. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to th ...

. It is unusual in the genus in that its flowers appear along long lengths of old wood.

Description

''Melaleuca agathosmoides'' is usually a shrub growing to a height of . The leaves are glabrous, long and

decussate Decussation is used in biological contexts to describe a crossing (due to the shape of the Roman numeral for ten, an uppercase 'X' (), ). In Latin anatomical terms, the form is used, e.g. . Similarly, the anatomical term chiasma is named aft ...

(arranged in alternating pairs). The flowers are ramiflorous, that is they grow along lengths of old wood rather than at the ends of branches or in the axils of leaves, singly or in groups of up to 20. The stamens are grouped in five bundles around the flower, each bundle containing 12 to 19 stamens. The cup-shaped base of the flower (the

hypanthium 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 ...

) is glabrous, long. The flowers are cream or white to greenish-white and appear between July and November. The fruit are woody capsules, long, with the sepals remaining as teeth around the fruits.

Taxonomy and naming

''Melaleuca agathosmoides'' was first formally described in 1939 by

Charles Austin Gardner Charles Austin Gardner (6 January 1896 – 24 February 1970) was an English-born Western Australian botanist. Biography Born in Lancaster, in England, on 6 January 1896, Gardner emigrated to Western Australia with his family in 1909, whe ...

from a specimen collected in the Coolgardie District at "Hatter's Hill, north of

Ravensthorpe Ravensthorpe may refer to any of the following places. England *Ravensthorpe, Dewsbury in West Yorkshire **Ravensthorpe railway station, Dewsbury *Ravensthorpe, Northamptonshire *Ravensthorpe, Peterborough in Cambridgeshire *Ravensthorpe, an histor ...

, in red loamy gravelly soil,

lowering In phonology and phonetics, raising is a sound change in which a vowel or consonant becomes higher or raised, meaning that the tongue becomes more elevated or positioned closer to the roof of the mouth than before. The opposite effect is known ...

Sept. 1929". 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 ...

(''agathosmoides'') is a reference to its similarity to plants in the genus '' Agathosma''.

Distribution and habitat

This melaleuca is restricted to the

Lake King Lake King is a town in the eastern Wheatbelt region of Western Australia, from Perth along State Route 40 between Kelmscott and Ravensthorpe. As of 2016, the town had a population of 95. The 2011 census recorded both the population of the tow ...

district of Western Australia in the Mallee

biogeographic region An ecoregion (ecological region) or ecozone (ecological zone) is an ecologically and geographically defined area that is smaller than a bioregion, which in turn is smaller than a biogeographic realm. Ecoregions cover relatively large areas of l ...

. It grows in gravelly, red clay

loam Loam (in geology and soil science) is soil composed mostly of sand (particle size > ), silt (particle size > ), and a smaller amount of clay (particle size < ). By weight, its mineral composition is about 40–40–20% concentration of sand–sil ...

on hills.

Conservation status

''Melaleuca agathosmoides'' is classified as " Priority One" by the

Government of Western Australia The Government of Western Australia, formally referred to as His Majesty's Government of Western Australia, is the Australian state democratic administrative authority of Western Australia. It is also commonly referred to as the WA Government o ...

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 ...

, meaning that it is known from only one or a few locations that are potentially at risk.

References

{{Taxonbar, from=Q15370773 agathosmoides Myrtales of Australia Plants described in 1939 Rosids of Western Australia Endemic flora of Western Australia