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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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Chickweed occurs either as an annual species or as a short-lived perennial. It produces several generations a year, each one flowering after just five weeks of growth. It can remain green and often stays in flower throughout winter. A single plant can produce about 2 500 red-brown seeds, which can remain viable in the soil for 25-40 years.

Published in Invasive Plants

Erect annual shrub, grows up to 1,5m high with sparsely hairy to smooth, green, brown or purple stems. Leaves are dark green or purple on the upper surface and paler underneath the leaves, and are sparsely hairy and bad smelling. Solitary white, mauve or purplish funnel-shaped flowers appear from October to March followed by brown hardened fruit capsules covered with slender spines up to 10mm long. The seeds and parts of this plant are poisonous to livestock and humans. 

Published in Invasive Plants

A long-lived (perennial) vine with stems often climbing up over other vegetation 6-10m tall, occasionally reaching 15m in height. It produces underground tubers and loses its leaves during the dry season in areas seasonal rains.

Published in Invasive Plants

Trailing or bushy plant grows up to 2m high. Leaves are grey-velvety turning dark green and less velvety with prominent veins and bad smelling. Solitary white, funnel-shaped flowers appear from July to October, followed by brown hardened fruit capsules densely covered with slender spines up to 10mm long. Seeds are poisonous to livestock and humans.

Published in Invasive Plants

A medium-sized wasp with a body length of 12-17mm. It has a black and yellow body pattern and looks very similar to the European paper wasp (Polistes dominulus). The antennae are black. These are social wasps and they construct paper-like nests in trees, roof eaves, under rock overhangs and sometimes in underground burrows.

Published in Invasive Animals
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General News Updates

2019 National Symposium on Biological Invasio…

26-02-2019

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

22-01-2019

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

04-09-2018

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?

01-03-2018

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

28-02-2018

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

25-01-2018

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