Acacia brachystachya Benth.

Species

Angiosperms > Fabales > Fabaceae > Acacia

Characteristics

Shrub branched at base, to 5 m high and wide. Branchlets with dense appressed hairs between dark resinous ribs; some red-glandular hairs on new growth. Phyllodes flat, occasionally subterete, straight, 4–11 (–18) cm long, 1–3 mm wide, finely striate, appressed-pubescent between longitudinal veins. Inflorescences single in axils; peduncles (2–) 3–10 mm long; spikes 10–30 mm long. Flowers 5-merous; sepals oblong, 0.5–0.8 mm (rarely to 1 mm) long, united in tube to 0.4 mm long or occasionally free, with long hyaline hairs on lobes; corolla 1.5–1.8 mm (rarely to 2 mm) long, pubescent to varying degrees; stamens to 3 mm long; ovary with dense ±appressed longish white hairs. Pods not stipitate, narrowly oblong in outline, straight, turgid, oval in section, to 7.5 cm long, 4–8 mm wide, dull brown with prominent yellowish resinous anastomosing longitudinal veins, elsewhere appressed-pubescent, tardily dehiscent. Seeds longitudinal, oblong, 5–8 mm long, 3–5 mm wide; aril small, terminal, pileate, pale.
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It is an evergreen shrub. It grows to 3-6 m tall and spreads to 2-6 m wide. The stem is erect and it has many branches which hang down. The branches start just above ground level. The leaves (phyllodes) are thin, covered with bluish bloom and about 5-20 cm long. They are like pine needles and stiff and erect. They are greyish-green. The flowers are golden spikes. They are 1.5-3 cm long. The pods are brown. They are 2-8 cm long and 0.2-0.7 cm wide. They are straight, swollen, hairy and leathery.
Life form perennial
Growth form shrub
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
Pollination entomogamy
Spread -
Mature width (meter) 2.0 - 6.0
Mature height (meter) 3.0 - 5.0
Root system -
Rooting depth (meter) 1.5
Root diameter (meter) -
Flower color
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer rhizobia
Photosynthetic pathway c3

Environment

Often on sandy loam soils in association with Acacia aneura and on sandy soils between dunes or on degraded dunes. In the eastern part of its range it also occurs on shallow stony soils. Its ecological requirements are similar to those of A. ramulosa but it has a narrower geographic range.
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Often on sandy loam soils in association with Acacia aneura and on sandy soils between dunes or on degraded dunes. In the eastern part of its range it also occurs on shallow stony soils.
It is a subtropical plant. It prefers dry stony well drained soils. It is native to central Australia. It needs an open sunny position. It is drought and frost resistant.
Light -
Soil humidity -
Soil texture 5-6
Soil acidity -
Soil nutriment -
Hardiness (USDA) 8-12

Usage

The seed are eaten.
Uses animal food fodder food fuel invertebrate food material medicinal
Edible pods seeds
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

It is grown from seed. The seed needs treatment to break the hard seed coat. Normally this is by putting the seeds in very hot water and letting the water cool down overnight then planting the seeds immediately. It can be grown from cuttings.
Mode cuttings seedlings
Germination duration (days) 21
Germination temperacture (C°) 21 - 26
Germination luminosity -
Germination treatment soaking
Minimum temperature (C°) -
Optimum temperature (C°) 20 - 40
Size -
Vigor -
Productivity -

Images

Acacia brachystachya unspecified picture

Distribution

Acacia brachystachya world distribution map, present in Australia

Conservation status

Acacia brachystachya threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:469872-1
WFO ID wfo-0000202933
COL ID 8NWD
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Acacia brachystachya Racosperma brachystachyum Acacia cibaria Acacia aneura var. brachystachya Acacia aneura var. stenocarpa