''Acacia effusifolia'' is a shrub or tree belonging to the genus ''
Acacia'' and the subgenus ''Juliflorae''. It is native to an 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 ...
and the
Wheatbelt regions 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 ...
.
Description
The shrub or tree typically grows to a height of and has few to many stems that have shallow or deep longitudinal flutings along their length. The grey to brown coloured bark is mostly smooth but can occasionally be fissured toward the base. The new shoots tend to be encrusted in resin and have a few red glandular hairlets while the resin ribbed branchlets are hairy between the ribs. Like most species of ''Acacia'' it has
phyllodes rather than true leaves. The green to grey-green, flat and sub-rigid phyllodes have a narrowly linear shape and are straight to shallowly curved with a length of and a width of and are
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 ...
or with tiny hairs between the many, fine longitudinal nerves. It mostly blooms between July and September producing yellow coloured flowers. The simple
inflorescence
An inflorescence is a group or cluster of flowers arranged on a Plant stem, stem that is composed of a main branch or a complicated arrangement of branches. Morphology (biology), Morphologically, it is the modified part of the shoot of sperma ...
s are often found in pairs in
axils with short-obloid to cylindrically shaped flower-heads with a length of and a diameter of packed with golden coloured flowers. Following flowering thinly coriaceous-crustaceous
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 that are straight to slightly curved form. the terete pods have a length of and a width of that have obscure longitudinal nerves. The shiny brown seeds found within the pods have an oblong shape and a length of with a white
aril.
Distribution
The bulk of the population is found from around
Mullewa to the south west with its range extending north to around
Meekatharra and east out as far as
Goongarrie with several outlying populations. It is usually situated on low hills, around
granite
Granite () is a coarse-grained ( phaneritic) 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 cools and solidifies under ...
outcrops, flats and sandplains where it grows in sandy or loamy soils that can contain a substantial amount of clay as a part of shrubland and
spinifex communities that usually contain a number of ''
Eucalyptus
''Eucalyptus'' () is a genus of over seven hundred species of flowering trees, shrubs or mallees in the myrtle family, Myrtaceae. Along with several other genera in the tribe Eucalypteae, including '' Corymbia'', they are commonly known as e ...
'' and other ''Acacia'' species.
[
]
See also
* List of ''Acacia'' species
References
{{Taxonbar, from=Q15500716
effusifolia
Acacias of Western Australia
Plants described in 2008
Taxa named by Bruce Maslin