Acacia suaveolens (Sm.) Willd.

Sweet acacia (en)

Species

Angiosperms > Fabales > Fabaceae > Acacia

Characteristics

Slender, sparingly branched shrub usually 1–3 m high. Branchlets acutely angled to flat, sometimes pruinose, glabrous. Phyllodes ascending to erect, narrowly linear to linear-oblanceolate or very narrowly elliptic, frequently shallowly incurved, (4–) 7–14 (–15) cm long,(1–) 2–10 (–12) mm wide, l: w = 12–25, narrowed at base, mucronate, thin to moderately coriaceous, glabrous; midrib prominent; lateral veins absent or obscure; glands not prominent, 0–2 mm above pulvinus, normally also at base of mucro. Inflorescences 6–12-headed racemes; raceme axes 1–3 cm long, enclosed when young by conspicuous imbricate bracts; peduncles 3–5 mm long, to 10 mm in fruit, slender, glabrous; heads globular, 3–10-flowered, usually ± white to cream or lemon yellow; bracteoles absent. Flowers 5-merous; sepals free, narrowly linear. Pods oblong, 2–5 cm long, 1–2 cm wide, thinly coriaceous-crustaceous, purplish brown to blue-black, pruinose, glabrous. Seeds transverse, elliptic, 6–7 mm long, shiny, black; aril brown-black.
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A straggly evergreen shrub. It grows to 2 m high and spreads to 2 m across. The stem is erect and slender. The small branches are sharply angular. They form a spreading open branched shrub. The leaves (phyllodes) are bluish grey and narrow. They have a single vein and are thickened at the edge. They are 5-14 cm long by 0.3-1 cm wide. They can be slightly curved. They are narrowed towards the base. The flowers are pale yellow balls. They are sweetly perfumed. They occur in long narrow clusters. A leaf like structure (bract) occurs near the flower buds but falls off early. The pods are long and flat. They can be 3-4 cm long by 1.5 cm across. They are purplish brown. The edges are thickened. There are about 6 seeds in a pod.
Unarmed slender little-branched shrub to 2.5 m high. Branchlets angular, glabrous, sometimes glaucous. Phyllodes coriaceous, glabrous, straight or slighdy curved, acute or obtuse, mucronate, (6-) 7.5-12.5 by (0.2-)0.3-0.7(-l) cm, (9-)13-27 (-35) times as long as wide, with a small gland at or within 4 mm of the base, pulvinus 1-2 mm. Flowering heads composed of 3-7 flowers, grouped in glabrous axillary racemes. Flowers whitish green, (4-)5-merous, bisexual. Pod with a striking blue-black colour, glabrous, glaucous, oblong, obtuse, apiculate, flat but raised over the seeds, 2.5-4 by 1.3-1.7 cm. Seeds transverse, 6-7 by 3-4.5 mm, pleurogram closed; funicle 3-folded and thickened in a slighdy oblique, basal aril.
Life form perennial
Growth form shrub
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) 2.0
Mature height (meter) 2.0 - 2.5
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer rhizobia
Photosynthetic pathway c3

Environment

It is a warm temperate and subtropical plant. It occurs naturally in south eastern Australia. It prefers sandy soils. It does best in an open sunny position but can grow in light shade. It is drought and frost resistant. It grows well in coastal positions but cannot tolerate salt spray. It suits hardiness zones 9-11. Tasmania Herbarium. Arboretum Tasmania.
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Grows in sand or on sandstone, usually in heath or woodland.
Light -
Soil humidity -
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 9-11

Usage

The young seeds are steamed and eaten. The pods are not eaten, The seeds can be cooked in the pod then removed. The leaves have been used as tea. They can be used fresh or dried.
Uses poison tanning tea
Edible leaves seeds
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

It is grown from seed. The seed need 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 pruned after flowering. 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°) -
Size -
Vigor -
Productivity -

Images

Leaf

Acacia suaveolens leaf picture by ian connop (cc-by-sa)

Flower

Acacia suaveolens flower picture by Troy Pentecost (cc-by-sa)
Acacia suaveolens flower picture by ian connop (cc-by-sa)
Acacia suaveolens flower picture by kima wareham (cc-by-sa)

Distribution

Acacia suaveolens world distribution map, present in Australia

Identifiers

LSID urn:lsid:ipni.org:names:471572-1
WFO ID wfo-0000185326
COL ID 8Q4Q
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Mimosa suaveolens Mimosa ambigua Phyllodoce suaveolens Hecatandra suaveolens Mimosa obliqua Mimosa angustifolia Acacia angustifolia Phyllodoce angustifolia Racosperma suaveolens Racosperma suaveolens Acacia odorata var. angustifolia Acacia suaveolens var. platycarpa Acacia suaveolens subsp. myallensis Acacia suaveolens subsp. prostrata Acacia suaveolens subsp. montana Acacia suaveolens subsp. grampianensis Acacia odorata Acacia suaveolens