''Acacia sibina'' is a tree or shrub belonging to the genus ''
Acacia
''Acacia'', commonly known as the wattles or acacias, is a large genus of shrubs and trees in the subfamily Mimosoideae of the pea family Fabaceae. Initially, it comprised a group of plant species native to Africa and Australasia. The genus na ...
'' and the subgenus ''Juliflorae'' the is endemic to parts of western
Australia
Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...
.
Description
The erect tree or shrub typically grows to a height of .
[ It has ]glabrous
Glabrousness (from the Latin ''glaber'' meaning "bald", "hairless", "shaved", "smooth") is the technical term for a lack of hair, down, setae, trichomes or other such covering. A glabrous surface may be a natural characteristic of all or part of ...
branchlets that are tomentulose in axils where the phyllodes are found. The erect, terete and evergreen phyllode
Phyllodes are modified petioles or leaf stems, which are leaf-like in appearance and function. In some plants, these become flattened and widened, while the leaf itself becomes reduced or vanishes altogether. Thus the phyllode comes to serve the ...
s are straight to slightly curved. The rigid an glaucous phyllodes have a length of and a diameter of . They have a pungent odour and are indistinctly striate.[ The simple ]inflorescence
An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Morphologically, it is the modified part of the shoot of seed plants where flowers are formed o ...
s are found in pairs in the axils. Each flower-spike has a cylindrical shape with a length of and a diameter of and are quite densely flowered packed with golden coloured flowers. After flowering firmly chartaceous linear shaped seed pod
This page provides a glossary of plant morphology. Botanists and other biologists who study plant morphology use a number of different terms to classify and identify plant organs and parts that can be observed using no more than a handheld magnify ...
s form that are raised over and constricted between each of the seeds. The glabrous pods can have a length of up to and a width of . The glossy dark brown seeds are arranged longitudinally within the pods. The seeds have an elliptic shape with a length of and have a yellow aril
An aril (pronounced ), also called an arillus, is a specialized outgrowth from a seed that partly or completely covers the seed. An arillode or false aril is sometimes distinguished: whereas an aril grows from the attachment point of the see ...
.[
]
Taxonomy
It was first described in 1977 by Bruce Maslin
Bruce Roger Maslin (born 3 May 1946) is an Australian botanist, known for his work on ''Acacia'' taxonomy.
Born in Bridgetown, Western Australia, he obtained an honours degree in botany from the University of Western Australia in 1967, then to ...
.[
]
Distribution
''A. sibina'' is native to a large area in the Mid West
The Midwestern United States, also referred to as the Midwest or the American Midwest, is one of four Census Bureau Region, census regions of the United States Census Bureau (also known as "Region 2"). It occupies the northern central part of ...
, Goldfields
Goldfield or Goldfields may refer to:
Places
* Goldfield, Arizona, the former name of Youngberg, Arizona, a populated place in the United States
* Goldfield, Colorado, a community in the United States
* Goldfield, Iowa, a city in the United State ...
and Wheatbelt region of 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 ...
where it is often situated on flats, sand plains and rocky hills growing in gravelly, yellow or red sandy soils or loamy soils over laterite.
See also
* List of ''Acacia'' species
References
{{Taxonbar, from=Q9569168
sibina
Acacias of Western Australia
Taxa named by Bruce Maslin
Plants described in 1977