Acacia paradoxa Dc.

Paradox acacia (en), Grand-Mimosa paradoxal (fr)

Species

Angiosperms > Fabales > Fabaceae > Acacia

Characteristics

Shrub up to 3.5 m high; young branchlets reddish-brown or brown, angular-striate, usually hirsute-pubescent, seldom glabrous. Stipules spinescent, in pairs, slender, divaricate, up to 1 cm long. Leaves phyllodic, apparently simple, 0.5-1(1.5) x 0.2-0.6 cm, obliquely-ovate to oblong or narrowly lanceolate, undulate, with a single nearly centric midrib, apex obtuse or distinctly mucronate, glabrous throughout or sometimes with hairs on the margins and on the midrib. Inflorescences capitate, on axillary peduncles which are about as long as the phyllodes. Flowers bright yellow. Calyx lobed but not separating into sepals, ± half as long as the corolla. Petals narrow, glabrous. Pods straight or ± falcate, 2.5-6 x 0.2-0.6 cm, dehiscent, villous, rarely glabrous or hispid. Seeds dark brownish-black, ±7 x 2.5 mm, smooth; caruncle conspicuous.
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Shrub or tree 2–5 (–8) m high; branches sometimes arching downwards. Branchlets ribbed, with variable indumentum, sometimes glabrous. Stipules spinose, spreading, 4–15 mm long. Phyllodes erect, oblique or dimidiate, lanceolate, sometimes narrowly oblong-elliptic, 8–20 mm long, normally 2–7 (–11) mm wide, acute or obtuse, sometimes rostellate, glabrous to sparsely hairy; midrib normally excentric; abaxial margin normally undulate. Inflorescences simple, normally 1 per axil; peduncles 5–15 (–20) mm long, normally glabrous; heads globular, to 12 mm diam. (fresh), densely (20–) 30–50-flowered, golden; bracteoles frequently acuminate. Flowers 5-merous; sepals united. Pods linear to narrowly oblong, to 6 cm long, 3–5 mm wide, thinly coriaceous, normally densely hairy. Seeds longitudinal, oblong, 3.5–5 mm long, shiny, dark brown, arillate.
Life form perennial
Growth form shrub
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
Pollination entomogamy
Spread -
Mature width (meter) 2.5 - 4.0
Mature height (meter) 3.0 - 4.0
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer
Photosynthetic pathway c3

Environment

Grows in dry sclerophyl forests. Usually grows in woodland or open forest. Found in a wide range of habitats, growing in various soil types.
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Usually grows in woodland or open forest. Commonly planted or naturalised.
Light 7-9
Soil humidity 1-6
Soil texture 1-6
Soil acidity 2-6
Soil nutriment -
Hardiness (USDA) 8-11

Usage

Has been planted as a hedge.
Uses dye environmental use wood
Edible flowers
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Can be grown by cuttings or seedlings. Seeds needs soaking.
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

Habit

Acacia paradoxa habit picture by arlas (cc-by-sa)

Leaf

Acacia paradoxa leaf picture by Harry Carter (cc-by-sa)
Acacia paradoxa leaf picture by Amanda Martin (cc-by-sa)
Acacia paradoxa leaf picture by arlas (cc-by-sa)

Flower

Acacia paradoxa flower picture by arlas (cc-by-sa)
Acacia paradoxa flower picture by Janine Zschech (cc-by-sa)

Fruit

Acacia paradoxa fruit picture by arlas (cc-by-sa)

Distribution

Acacia paradoxa world distribution map, present in Australia, Chile, India, Mauritius, New Zealand, United States of America, and South Africa

Conservation status

Acacia paradoxa threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:471079-1
WFO ID wfo-0000185340
COL ID 8PSR
BDTFX ID 118696
INPN ID 717048
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Acacia paradoxa Acacia hybrida Mimosa paradoxa Phyllodoce undulata Mimosa paradoxa Mimosa armata Phyllodoce armata Racosperma armatum Acacia undulata Acacia undulata Racosperma undulatum Acacia undulata Acacia ornithophora Acacia furcifera Acacia undulata Racosperma paradoxum Acacia falcifolia Acacia armata f. undulata Racosperma paradoxum Acacia armata Acacia armatoides Acacia armata var. paradoxa Acacia armata var. undulata Acacia armata var. ornithophora Acacia armata var. microphylla Acacia undulata var. longispina Acacia armata var. pendula Acacia armata var. longipedunculata Acacia armata var. typica Acacia armata var. undulata Acacia armata var. angustifolia Acacia undulata var. elegans