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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

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Distribution, ecology and management of Rubber vine

Ludi Kern - Invasive Species Programme, SANBI

Rubber vine (Cryptostegia grandflora) and Madagascar rubber vine (Cryptostegia madagascarensis) originates from Madagascar where they are restricted to drier areas that receive 350-800mm rainfall annually.

Both species are serious invaders in climatically suitable countries across the world, including Australia where C. grandiflora is listed as a Weed of National Significance.

In South Africa both Cryptostegia species are proposed for listing under NEMBA as category 1b species.
Some occurrence records exit for these species in urban and natural areas in Southern Africa and one of this species is (C grandiflora) is well established and invasive along the Mogalakwena River in Limpopo Province.

As a result, there is concern that C. grandiflora and C. madagascarensis could potentially pose a risk to sensitive unique riparian areas in South Africa.

Few occurrence data exist for these species in Southern Africa making it difficult to determine the species’ current distributions.

Pilot surveys conducted along the Mogalakwena River in the Limpopo province have shown that some areas have densities as high as 2000 plants, although these infestations occur no further than 40m away from the Mogalakwena River.

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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


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