The worst Potential Threats.
Our efforts to control invasive alien plants have shown the merit in dealing with plants at an early stage – before their full invasive potential is realized. To this end, Working for Water is undertaking research to identify invasive plants that have the potential to become bigger problems in the future. A preliminary list of 84 plant species has been identified. The following ten plant species are among those that we have to ‘nip in the bud’, now.
Note:
Category 1 plants must be removed.
Category 2 plants may only be grown in legally demarcated areas.
Category 3 plants may not be sold or cultivated, in terms of the Conservation of Agricultural Resources Act.
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Kangaroo Thorn - Acacia paradoxa
(Australia)
Shrub up to 3.5m high with golden-yellow globular flowerheads (flowers from August – October). It threatens to invade mountain fynbos, Eastern Cape thicket and savanna areas, and could transform these areas in a manner that Rooikrans (Acacia Cyclops) has done in drier coastal areas. Already a Category 1 species.
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Pearl Acacia – Acacia podalyriifolia
(Australia)
Shrub or small tree, 3-6m high, velvety silver-grey leaves with golden-yellow globular flowers (June – August). Invades disturbed areas and water courses. Seeds dispersed through insects and birds. Threat in Western Cape, eastern seaboard and Highveld. Currently a Category 3 species, but under review. |
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