Acacia stenophylla

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Acacia stenophylla
Acacia-stenophylla-flowers.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fabales
Family: Fabaceae
Subfamily: Caesalpinioideae
Clade: Mimosoid clade
Genus: Acacia
Species:
A. stenophylla
Binomial name
Acacia stenophylla
A.Cunn. ex Benth.
Acacia stenophyllaDistMap851.png
Occurrence data from AVH
Synonyms

Acacia stenophylla, commonly referred to as the shoestring acacia, is an evergreen tree in the family Fabaceae and native to Australia. It is not considered rare or endangered. [2]

Contents

Description

Acacia stenophylla varies in characteristic and size from a rounded, multi-stemmed shrub to a spreading tree. [3] A. stenophylla grows from 4–20 m (13–66 ft) tall, [3] often stemming into branches at the trunk from about 1 m (3.3 ft). [4] Bark is dark-grey to blackish and rough, branchlets are smooth to sericeous and sometimes angular. [3]

The phyllodes are strap-like, 15–40 cm (5.9–15.7 in) long, 2–10 mm (0.08–0.4 in) wide, straight to slightly curved, slightly rough, free from hair or very finely puberulous, acute to acuminate, apex is often strongly curved. [3] Veins are copious and closely parallel. [5]

The racemes are 3– to 5-headed, with stems 2–15 mm (0.08–0.6 in) long, which are slightly rough or with appressed minute hairs. [3] The peduncles are 6–13 mm (0.2–0.5 in) long. [3] The flower heads are creamy-white to pale yellow in colour, spherical and 6–9 mm (0.2–0.4 in) in diameter. [3] Flowers are pentamerous, with sepals three-quarters united. [3]

The pods are moniliform, up to 26 cm (10 in) long, 8–12 mm (0.3–0.5 in) wide, woody-leathery textured, smooth except micro-puberulous between seeds. [3] The seeds are longitudinal, elliptic, 7–9 mm (0.3–0.4 in) long, dark brown, lacking an aril, funicle enlarged, are folded at the seed apex. [3] Flowering time is often irregular, although mainly occurring in autumn. [3]

A. stenophylla is highly salt tolerant and moderately frost and drought tolerant. [6] The average minimum annual rainfall that the tree needs is around 400 mm (16 in) per year. [7]

Reproduction and dispersal

Acacia stenophylla normally flowers from March to August, [8] although it can flower irregularly throughout the year. [5] [9] Seed pods turn woody as they mature from October to December and produce approximately 6–12 viable seeds/g. [6]

A. stenophylla seeds germinate prolifically. [10] After major floods, seedlings can often be present along the flood-line, but only a very small proportion of these persist. [11]

Taxonomy

Acacia stenophylla belongs to the genus Acacia , comprising 1200 species worldwide. [2] 900 of these species are endemic to Australia. [2]

Common names

Common names used in Australia include Balkura, Belalie, black wattle, Dalby myall, Dalby wattle, Dunthy, Eumong, Gooralee, Gurley, ironwood, Munumula, native willow, river cooba, and river myall. [1]

Etymology

The specific epithet is derived from the Greek stenos (narrow) and phyllon (leaf), meaning 'with narrow leaves'. [12]

Distribution

Acacia stenophylla is predominantly distributed in central and eastern Australia. [13]

A. stenophylla is found from the Murray River in South Australia and Victoria through western New South Wales, Northern Territory, and Queensland, with a small population also occurring in Western Australia. [13]

It mainly occurs from latitude 23° to 33° S [13] with a range from 17° to 36°S. [13] In altitude, it mainly occurs between 50 and 325 m [13] ASL with a range from near sea level to 625 m. [13]

Ecology

Climate

Acacia stenophylla is most commonly found in a warm arid climatic zone. [13] A. stenophylla tends to grow to a larger size in semiarid climates, which exist in New South Wales and Queensland. [13] The species also expands into the sub-humid zone in Queensland. [13]

Disregarding the species' far southern distribution, the mean maximum temperature of the warmest month is 35–38 °C and the mean minimum of the coolest month 4–7 °C. [13] There are, on average, about 110–130 days per year over 32 °C and 15–50 days over 38 °C. [6]

A. stenophylla is subject to 1–20 heavy frosts per year, [13] and withstands a variable rainfall frequency. [13] Rainfall is often augmented by groundwater or periodic flooding. [6]

Physiography and soils

Acacia stenophylla is common throughout the Interior Lowlands physiographic division. [13] It is often present on plains and gentle slopes and is common on the banks of watercourses, river flood plains, and depressions. [13] The soils are predominantly fine-textured alluvials, red sandy clay and grey cracking clays. [13] Soils often have a high pH and may be more saline in the lower horizons. [13]

Vegetation type

Acacia stenophylla occurs in ribbon-like stands along watercourses, often as a part of eucalyptus dominated open-forest, woodland or low woodland. [13] The species can be present in the understorey, often with Acacia salicina and Acacia pendula. [13] It can also occur alongside Eucalyptus populnea and Casuarina cristata , but commonly grows independently alongside watercourses in semiarid areas. [14]

Utilisation and uses

Acacia stenophylla is rarely utilised by cattle, [11] but it is palatable to sheep. [15] Seeds and pods of A. stenophylla were roasted and used by Indigenous Australians as a food source. [16]

The plant is said to contain medicinal alkaloids. [17]

A. stenophylla is widely planted as a drought tolerant and decumbent ornamental tree. [13] It is cultivated by plant nurseries, and used in modernist gardens and in public landscapes in the Southwestern United States and California.[ citation needed ]

Related Research Articles

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<i>Acacia cultriformis</i> Species of legume

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<i>Acacia pycnantha</i> Golden wattle of southeastern Australia

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<i>Acacia craspedocarpa</i> Species of legume

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<i>Acacia papyrocarpa</i> Species of plant

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<i>Acacia</i> Genus of plants

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<i>Acacia parramattensis</i> Species of legume

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<i>Acacia complanata</i> Species of legume

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<i>Acacia fimbriata</i> Species of legume

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<i>Acacia pendula</i> Species of legume

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<i>Acacia lineata</i> Species of legume

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<i>Acacia homalophylla</i> Species of legume

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<i>Acacia elachantha</i> Species of plant

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<i>Acacia jibberdingensis</i> Species of legume

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<i>Acacia dictyophleba</i> Species of plant

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<i>Acacia microbotrya</i> Species of legume

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<i>Acacia pataczekii</i> Species of plant

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<i>Acacia calcicola</i> Species of plant

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<i>Acacia rubida</i> Species of legume

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<i>Acacia doratoxylon</i> Species of plant

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References

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  15. Manifold, C. B. (April 1948). "The Use and Misuse of Shrubs and Trees as Fodder". Geographical Review. 38 (2): 342. Bibcode:1948GeoRv..38..342M. doi:10.2307/210871. ISSN   0016-7428. JSTOR   210871.
  16. Cribb, Philip; Winterringer, G.S.; Sheviak, C.J. (1976). "Wild Orchids of Illinois". Kew Bulletin. 31 (1): 200. doi:10.2307/4109021. ISSN   0075-5974. JSTOR   4109021.
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