''Acacia resinicostata'' is a 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 ''Phyllodineae'' native to north eastern
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
glabrous and somewhat resinous shrub typically grows to a height of and has a bushy, rounded habit. It branchlets have small rounded protuberances and crowded, light green, linear to narrowly oblong shaped flat
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 that are straight or incurved. They have a length of and a width of and are abruptly constricted at the base with an obscure midrib. 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 occur singly in the
axil
A leaf ( : leaves) is any of the principal appendages of a vascular plant stem, usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, st ...
s and have spherical flower-heads that contain 25 to 35 deep lemon yellow coloured flowers. The firmly chartaceous
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 form after flowering have a narrowly oblong shape with a length up to containing longitudinally arranged seeds. The black seeds have an oblong-elliptic shape with a length of and a cream coloured clavate
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 ...
.
[
]
Distribution
It is a disjunct distribution 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 Carnarvon Range in south eastern Queensland
)
, nickname = Sunshine State
, image_map = Queensland in Australia.svg
, map_caption = Location of Queensland in Australia
, subdivision_type = Country
, subdivision_name = Australia
, established_title = Before federation
, established_ ...
and around further south between Djuan and Karara where it is found in dissected sandstone
Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks.
Most sandstone is composed of quartz or feldspar (both silicates) ...
country in skeletal soils as a part of open woodland communities.
See also
* List of ''Acacia'' species
References
{{Taxonbar, from=Q9568543
resinicostata
Endemic flora of Queensland
Plants described in 1974
Taxa named by Leslie Pedley