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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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Saligna gum

Eucalyptus grandis

Common name:

Saligna gum

Scientific name:

Eucalyptus grandis (Myrtaceae)

Alternative common names:

bluegum; rose gum; saligna (English); salignabloekom (Afrikaans)

A tall, evergreen tree with a shaft-like trunk 25-55m high with smooth bark except for the part of the trunk up to 4m from the ground. The bark peels in long, thin strips to expose a powdery, white, grey-white or blue-grey surface. Dark green leaves which are glossy above and paler below. Cream flowers appear from April to August. Brown fruit capsules with a bluish-grey powdery surface. This tree invades forest clearings, plantations, water courses and roadsides.

Additional Info

  • Where does this species come from?

    East and north-east Australia.

    What is its invasive status in South Africa?

    CARA 2002 – Category 2 NEMBA - a. Category 1b within- (i) riparian areas; (ii) a Protected Area declared in terms of the Protected Areas act; or, (iii) within a Listed Ecosystem or an ecosystem identified for conservation in terms of a Bioregional Plan or Biodiversity Management Plans published under the Act. b. Not listed within Nama-Karoo, Succulent Karoo and Desert biomes, excluding within any area mentioned in (a) above. c. Category 1b in Fynbos, Grassland, Savanna, Albany Thicket, Forest and Indian Ocean Coastal Belt biomes, but- (i) Category 2 for plantations, woodlots, bee-forage areas, wind-rows and the lining of avenues. (ii) Not listed within cultivated land that is at least 50 metres away from untransformed land, but excluding within in any area in (a) above. (iii) Not listed within 50 metres of the main house on a farm, but excluding in (a) above. (iv) Not listed in urban areas for trees within a diameter of more than 400 mm at 1000 mm height at the time of publishing of this Notice, but excluding in (a) above.

    Where in South Africa is it a problem?

    Widely distributed throughout KwaZulu-Natal, Mpumalanga and Limpopo Provinces.

    How does it spread?

    Spreads by seed dispersal.

    Why is it a problem?

    It competes with and replaces indigenous species. Stands of trees along watercourses are likely to reduce stream flow.

    What does it look like?

    General description: Tall, evergreen tree with shaft-like trunk, 25-55m high; bark smooth, except butt up to 4m, peeling in long, thin strips to expose a powdery, white, grey-white or blue-grey surface. Leaves: Dark green and glossy above, paler below; adult leaves 130-200 mm long, similar to juvenile leaves. Flowers: Cream with long-exerted stamens, buds, to 8mm long, pear-shaped with conical lids. Fruit/Seeds: Brown capsules with bluish-grey bloom, pear-shaped, 7-10mm long, with protruding valves that arch inwards.

    Does the plant have any uses?

    Used as timber, shelter, shade, firewood; honey source.

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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