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German wasp | Vespula germanica

German wasp

Vespula germanica

Coral bush | Ardisia crenata

Coral bush

Ardisia crenata

Purple loosestrife | Lythrum salicaria

Purple loosestrife

Lythrum salicaria

Pom pom weed | Campuloclinium macrocephalum

Pom pom weed

Campuloclinium macrocephalum

Canarybird bush | Crotalaria agatiflora

Canarybird bush

Crotalaria agatiflora

Peanut butter cassia | Senna didymobotrya

Peanut butter cassia

Senna didymobotrya

Rubber vine | Cryptostegia grandiflora

Rubber vine

Cryptostegia grandiflora

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Environmental Programmes

In order to tackle our country’s socio-economic challenges, the government adopted the Outcomes based approach to improve government performance and providing focus on service delivery. find out more

Silver wattle

Acacia dealbata

Common name:

Silver wattle

Scientific name:

Acacia dealbata (Fabaceae)

Alternative common names:

Silwerwattel (Afrikaans)

A fast-growing evergreen tree or shrub, reaching heights of 5-10m, the silver wattle is largely problematic in areas of Kwa-Zulu Natal, Free State and Gauteng.  It has short leaflets with fine hairs and usually silvery-grey in colour. Blooming in July and August, flowers are bright yellow. 

Additional Info

  • Where does this species come from?

    South-eastern Australia and Tasmania

    What is its invasive status in South Africa?

    CARA 2002 – Category 1(Western Cape), Category 2 (rest of SA) NEMBA – Category 2

    Where in South Africa is it a problem?

    Kwa-Zulu Natal, Gauteng, Free State and Mpumalanga Provinces.

    How does it spread?

    Seed dispersal.

    Why is it a problem?

    It results in a loss of large amounts of water run-off. Silver wattle also competes with and replaces indigenous grassland and riverine species.

    What does it look like?

    Description: A fast-growing evergreen tree or shrub, reaching heights of 5-10m. Leaves: Silver-grey to light green, finely haired short leaflets. Flowers: From July to August, pale to bright yellow globe-shaped flower heads in large fragrant sprays. Fruit/seeds: Brown or purplish brown flattened pods.

    Does the plant have any uses?

    Cultivated for timber use for poles and firewood.

    Plant me instead alternatives

    Common hook-thorn (Acacia caffra), weeping wattle (Peltophorum africanum), ouhout (Leucosidea sericea), mountain karee (Rhus leptodictya), karee (Rhus lancea), blossom tree/keurboom (Virgilia oroboides)

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General News Updates

2019 National Symposium on Biological Invasio…


This is your invitation to South Africa's 2019 National Symposium on Biological Invasions. The convention is hosted by the Centre for Invasion Biology (CIB), University of Stellenbosch, and the Biolo... Read more

2019 Invasive Species Training


During the past five years (2014-2018), ISSA invasive species trainers have trained 4 000 in the identification of invasive species and laws pertaining to invasive species across South Africa.  ... Read more

Alien Grass Working Group


Who are we? The South African National Alien Grass Working Group was jointly initiated by the South African Biodiversity Institute (SANBI) and the Centre for Excellence in Invasion Biology (C·I·B) in... Read more

Permits for planting indigenous Cynodon?


On 16 February, 2018, South Africa's Department of Environmental Affairs issued amendments to the regulations and lists relating to the National List of Invasive Species.  Updates to the draft&n... Read more

Invasive species training 2018 dates released


Interested in invasive species?  How much do you know about NEMBA invasive species compliance for landowners and organs of state? The South African Green Industries Council (SAGIC) have released... Read more

Communications post for Africa advertised


The Nature Conservancy has advertised a brand new post:  Communications Manager, Africa Region. Knowledge of invasive species and water would be an asset in this post. See details below:    Job Titl... Read more