''Acacia flavescens'', also known as the red wattle, yellow wattle or primrose ball wattle, is a tree in 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 ...

'' native to eastern Australia.

Description

The tree typically grows to a height of and has rough, furrowed and shaggy looking brown bark. The angular branchlets have a yellowish tinge explaining the common name. The 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 have a narrowly elliptic to

lanceolate The following is a list of terms which are used to describe leaf morphology in the description and taxonomy of plants. Leaves may be simple (a single leaf blade or lamina) or compound (with several leaflets). The edge of the leaf may be regular o ...

shape and are in length and wide. When it blooms it produces axillary

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 with globular flowerheads with a diameter of containing 30 to 60 cream coloured flowers. Following flowering it forms

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 ...

flat

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 up to in length with a width of . The dull black seeds within have an elliptic shape and are in length.

Taxonomy

The type specimen was collected by Allan Cunningham in 1819 from along the Queensland coast during his voyage aboard HMS ''Mermaid''. The species was first formally described in 1842 by

George Bentham George Bentham (22 September 1800 – 10 September 1884) was an English botanist, described by the weed botanist Duane Isely as "the premier systematic botanist of the nineteenth century". Born into a distinguished family, he initially studi ...

as part of

William Jackson Hooker Sir William Jackson Hooker (6 July 178512 August 1865) was an English botanist and botanical illustrator, who became the first director of Kew when in 1841 it was recommended to be placed under state ownership as a botanic garden. At Kew he ...

's work ''Notes on Mimoseae, with a synopsis of species'' as published in the ''London Journal of Botany''. It was reclassified in 1987 as ''Racosperma flavescens'' by

Leslie Pedley Leslie Pedley (19 May 1930 – 27 November 2018)IPNILeslie Pedley/ref> was an Australian botanist who specialised in the genus ''Acacia''. He is notable for bringing into use the generic name ''Racosperma'', creating a split in the genus, which r ...

then transferred back to genus ''Acacia'' in 2006. Other synonyms include; ''Acacia flavescens'' var. ''typica'' and ''Acacia flavescens'' var. ''nobilis'' as described by

Karel Domin Karel Domin (4 May 1882, Kutná Hora, Kingdom of Bohemia – 10 June 1953, Prague) was a Czech botanist and politician. After gymnasium school studies in Příbram, he studied botany at the Charles University in Prague ) , image_name = C ...

and ''Acacia flavescens'' Benth. var. ''flavescens''. ''A. flavescens'' resembles and is closely related to '' Acacia leptoloba''.

Distribution

The tree is found through much of 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_ ...

mostly along areas near the coast extending from around Cape York in the north down to

Brisbane Brisbane ( ) is the capital and most populous city of the states and territories of Australia, Australian state of Queensland, and the list of cities in Australia by population, third-most populous city in Australia and Oceania, with a populati ...

in the south where it is part of ''Eucalypt'' forest and woodland communities growing in sandy soils and along the margins of monsoon and

rainforest Rainforests are characterized by a closed and continuous tree canopy, moisture-dependent vegetation, the presence of epiphytes and lianas and the absence of wildfire. Rainforest can be classified as tropical rainforest or temperate rainfores ...

communities. It typically grows in altitudes ranging from

sea level Mean sea level (MSL, often shortened to sea level) is an average surface level of one or more among Earth's coastal bodies of water from which heights such as elevation may be measured. The global MSL is a type of vertical datuma standardised g ...

to .

Cultivation and uses

The species is sold commercially as seedlings or in seed form. Seeds need to be pre-treated by scarifying or soaking in hot water prior to planting. The tree grows well in a sunny location in a wide range of soils including poor soils. It is fast growing and can shoot from root

sucker Sucker may refer to: General use * Lollipop or sucker, a type of confection * Sucker (slang), a slang term for a very gullible person * Hard candy ** Cough drop ** Mint (candy) Biology * Sucker (botany), a term for a shoot that arises undergro ...

s making it a possible weed problem. It has a symbiotic relationship with

nitrogen fixing bacteria Nitrogen is the chemical element with the symbol N and atomic number 7. Nitrogen is a nonmetal and the lightest member of group 15 of the periodic table, often called the pnictogens. It is a common element in the universe, estimated at seventh ...

found on the root nodules. The wood can be used as a fuel and the plant grown for soil stabilization or

erosion Erosion is the action of surface processes (such as water flow or wind) that removes soil, rock, or dissolved material from one location on the Earth's crust, and then transports it to another location where it is deposited. Erosion is distin ...

control. The bark contains 10 to 26%

tannin Tannins (or tannoids) are a class of astringent, polyphenolic biomolecules that bind to and precipitate proteins and various other organic compounds including amino acids and alkaloids. The term ''tannin'' (from Anglo-Norman ''tanner'', ...

. The bark is an

astringent An astringent (sometimes called adstringent) is a chemical that shrinks or constricts body tissues. The word derives from the Latin ''adstringere'', which means "to bind fast". Calamine lotion, witch hazel, and yerba mansa, a Californian plant ...

and can be used externally to treat wounds or internally to treat

diarrhoea Diarrhea, also spelled diarrhoea, is the condition of having at least three loose, liquid, or watery bowel movements each day. It often lasts for a few days and can result in dehydration due to fluid loss. Signs of dehydration often begin wi ...

and

dysentery Dysentery (UK pronunciation: , US: ), historically known as the bloody flux, is a type of gastroenteritis that results in bloody diarrhea. Other symptoms may include fever, abdominal pain, and a feeling of incomplete defecation. Complications ...

References

{{Taxonbar, from=Q4670936 flavescens Flora of Queensland Plants described in 1842