Acacia mearnsii

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 Acacia mearnsii subsp. var.  Late black wattle, Black Wattle
Acacia mearnsii blossoms.jpg
Habit: tree
Height: to
Width: to
30ft 25ft
Height: warning.png"" cannot be used as a page name in this wiki. to 30 ft
Width: warning.png"" cannot be used as a page name in this wiki. to 25 ft
Lifespan: perennial
Origin: Australia
Bloom: early spring, mid spring, late spring, early summer, mid summer, late summer
Exposure: sun
Features: evergreen, flowers, invasive
Hidden fields, interally pass variables to right place
Minimum Temp: °Fwarning.png"°F" is not a number.
USDA Zones: 8 to 11
Sunset Zones:
Flower features: orange, yellow
Fabaceae > Acacia mearnsii var. ,

Acacia mearnsii is a fast-growing leguminous tree native to Australia. Common names for it include Black Wattle, Acácia-negra (Portuguese), Australian Acacia, Australische Akazie (German), Swartwattel (Afrikaans), Uwatela (Zulu). This plant is now known as one of the worst invasive species in the world.[1]

The trees are unarmed, evergreen and grow six to 20 meters high. The branchlets are shallowly ridged; all parts finely hairy; growth tips golden-hairy. Leaves dark olive-green, finely hairy, bipinnate; leaflets short (1.5 - 4 mm) and crowded; raised glands occur at and between the junctions of pinnae pairs. Flowers pale yellow or cream, globular flower heads in large, fragrant sprays. Fruits dark brown pods, finely hairy, usually markedly constricted.[2][3][4]



Pests and diseases




  1. Global Invasive Species Database: 100 Worst Invasive Species
  2. Henderson, L. 1995. Plant invaders of Southern Africa. Agriculture Research Council, ARC/LNR, Pretoria, South Africa. 55 pp.
  3. PIER 2003 Pacific Island Ecosystems At Risk web
  4. De Wit, M.P., Crookes, D.J. and Van Wilgen, B.W. 2001. Conflicts of Interest in Environmental Management: Estimating the Costs and Benefits of a Tree Invasion, Biological Invasions: 3 167 - 178.

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