Invasive alien species are plants, animals, pathogens and other organisms that are non-native to an ecosystem, and which may cause economic or environmental harm or adversely affect human health.
List Of Alien Invasive Plants In South Africa
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KIND OF PLANT (BOTANICAL NAME)
COMMON NAME
CATEGORY
PHOTOS
Acacia adunca A.Cunn. ex G.Don
Cascade Wattle, Wallaranga Wattle
1a
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Acacia cyclops A.Cunn. ex G.Don
Red Eye, Rooikrans
1b
Acacia dealbata
Silver wattle
2
Acacia decurrens Willd, and hybrids, varieties and selections
Green wattle
1b
Acacia elata A.Cunn. ex Benth (Acacia terminalis (Salisb.) misapplied in South Africa)
Pepper tree wattle
1b
Acacia implexa Benth.
Screw pod wattle
1a
Acacia longifolia (Andrews) Willd.
Long-leaved wattle
1b
Acacia mearnsii De Wild. and hybrids, varieties and selections
Black wattle
2
Acacia melanoxylon R.Br. and hybrids, varieties and selections
Australian blackwood
2
Acacia paradoxa DC. (= A. armata R.Br.)
Kangaroo Thorn, Kangaroo wattle
1a
Acacia podalyriifolia A.Cunn. ex G.Don
Pearl acacia
1b
Acacia pycnantha Benth.
Golden wattle
1b
Acacia saligna (Labill.) H.L.Wendl.
Port Jackson Willow
1b
Acacia stricta (Andrews) Willd.
Hop Wattle
1a
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Acer buergerianum Miq.
Chinese Maple
a) Category 3 Eastern Cape, KwaZulu-Natal, Limpopo, Mpumalanga, North-West, Northern Cape and Western Cape
b) Not listed in urban areas in the Eastern Cape, KwaZulu-Natal, Limpopo, Mpumalanga, North-West, Northern Cape and Western Cape.
c) Not listed elsewhere.
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Agave americana L. subsp. americana var. expansa (Jacobi) Gentry
Invasive alien vegetation refers to plants brought to South Africa from other countries, both intentionally and unintentionally, that cause human, environmental or economic harm. Without natural enemies, these plants reproduce and spread rapidly, taking valuable water and space from our indigenous plants.
How many alien invasive plants are there in South Africa?
The regulations identify a total of 559 alien species, including 383 plant species as invasive in four different categories, and a further 560 species listed as prohibited and may not be introduced into the country. Visit https:// www.environment.co.za for a list of AIPs and their categories.
What is one plant species that is illegally harvested in South Africa?
South Africa’s ancient cycad plants are under threat due to poaching. The species is more than 300 million years old and is the oldest seed plant. They are illegally harvested and traded locally and internationally.
Why are invasive species a problem in South Africa?
Some species have serious negative impacts on South African ecosystems, for example, some invasive tree species like the pines, eucalyptus, and wattles use much larger quantities of water than the native trees they are displacing.