The plants listed here have all been introduced into southern Africa, either intentionally or not, and have become naturalised to the extend where they can spread without the aid of human intervention. They have established themselves in the southern Cape region and are threatening both natural ecosystems and agricultural productivity. By being included in this list does not automatically brand a plant as undesirable and to be eradicated in all situations, because many of the species are grown commercially or are cultivated in parks and gardens. It is only when a plant “escapes” and grows in places considered undesirable, like conservation areas and along watercourses, that it should be removed.
Declared Plant Invaders
- Acacia baileyana – Bailey’s Wattle, Bailey-se-wattel
- Acacia cyclops – Red Eye, Rooikrans
- Acacia dealbata – Silver Wattle, Silwerwattel
- Acacia elata – Peppertree Wattle, Peperboomwattel
- Acacia longifolia – Long-leaved Wattle, Langblaarwattel
- Acacia mearnsii – Black Wattle, Swartwattel
- Acacia melanoxylon – Australian Blackwood, Australiese Swarthout
- Acacia podalyriifolia – Pearl Acacia, Vaalmimosa
- Acacia pycnantha – Golden Wattle, Gouewattel
- Acacia saligna – Port Jackson Willow, Port Jackson
- Agave americana – American Agave, Garingboom
- Agave sisalana – Sisal
- Ailanthus altissima – Tree-of-heaven, Hemelboom
- Araujia sericifera – Moth Catcher, Motvanger
- Arundo donax – Giant Reed, Spaanse Riet
- Atriplex lindleyi subsp. inflata – Sponge-fruit Saltbush, Blasiesoutbos
- Atriplex nummularia subsp. nummularia – Old Man Saltbush, Oumansoutbos
- Casuarina cunninghamiana – Beefwood, Kasuarisboom
- Casuarina equisetifolia – Horsetail Tree, Perdestertboom
- Cereus jamacaru – Queen of the Night, Nagblom
- Cirsium vulgare – Scotch Thistle, Skotse Dissel
- Cortaderia selloana – Pampas Grass, Pampasgras
- Cuscuta campestris – Common Dodder, Gewone Dodder
- Cuscuta suaveolens – Lucerne Dodder, Luserndodder
- Datura stramonium – Common Thorn Apple, Gewone Stinkblaar
- Echinopsis spachiana – Torch Cactus, Orrelkaktus
- Echium plantagineum – Patterson’s Curse, Pers Echium
- Echium vulgare – Blue Echium, Blou Echium
- Eichhornia crassipes – Water Hyacinth, Waterhiasint
- Eucalyptus camaldulensus – Red River Gum, Rooibloekom
- Eucalyptus cladocalyx – Sugar Gum, Suikerbloekom
- Eucalyptus diversicolor – Karri, Karie
- Eucalyptus lehmannii – Spider Gum, Spinnekopbloekom
- Hakea drupacea – Sweet Hakea, Soethakea
- Hakea gibbosa – Rock Hakea, Harige Hakea
- Hakea sericea – Silky Hakea, Syerige Hakea
- Hypericum perforatum – St. John’s Wort, Johanneskruid
- Lantana camara – Lantana
- Leptospermum laevigatum – Australiese Myrtle, Australiese Mirt
- Melia azedarach – Syringa, Sering
- Morus alba – White Mulberry, Witmoerbei
- Myoporum tenuifolium subsp. montanum – Manatoka
- Myriophyllum spicatum – Spiked Water-milfoil
- Nassella trichotoma – Nassella Tussock, Nassella-polgras
- Nerium oleander – Oleander, Selonsroos
- Nicotiana glauca – Wild Tobacco, Wildetabak
- Opuntia ficus-indica – Sweet Prickly Pear, Boereturksvy
- Opuntia imbricata – Imbricate Prickly Pear, Kabelturksvy
- Paraserianthes lophantha – Stink Bean, Stinkboon
- Passeflora caerulea – Blue Passion Flower, Siergrenadella
- Pennisetum clandestinum – Kikuyu Grass, Kikoejoegras
- Pennisetum setaceum – Fountain Grass, Pronkgras
- Pennisetum villosum – Feathertop, Veergras
- Pinus canariensis – Canary Pine, Kanariese Den
- Pinus halepensis – Aleppo Pine, Aleppoden
- Pinus pinaster – Cluster Pine, Trosden
- Pinus pinea – Umbrella Pine, Sambreelden
- Pinus radiata – Radiata Pine, Radiataden
- Populus x canescens – Grey Poplar, Vaalpopulier
- Prosopis glandulosa var. torreyana – Honey Mesquite, Heuningprosopis
- Psidium guajava – Guava, Koejawel
- Pyracantha angustifolia – Yellow Firethorn, Geelbranddoring
- Quercus robus – Englisk Oak, Akkerboom
- Ricinus communis – Castor-oil Plant, Kasterolieboom
- Robinia pseudoacacia – Black Locust, Witakasia
- Rorippa nasturtium-aquaticum – Watercress, Bronkors
- Rosa eglanteria – Sweetbriar, Wilderoos
- Rubus cuneifolius
- Rubus flagellaris
- Rubus fruticosus – European Blackberry, Braam
- Rubus x proteus
- Salix babylonica – Weeping Willow, Treurwilger
- Salsola kali – Russian Tumbleweed, Russiese Rolbossie
- Salvinia molesta – Kariba Weed, Watervaring
- Schinus molle – Pepper Tree, Peperboom
- Sesbania punicea – Red Sesbania, Rooisesbania
- Solanum elaeagnifolium – Silver-leaf Bitter Apple, Satansbos
- Solanum mauritianum – Bugweed, Luisboom
- Spartium junceum – Spanish Broom, Spaanse Besem
- Tamarix ramosissima – Pink Tamarisk, Perstamarisk
- Xanthium spinosum – Spiny Cocklebur, Boetebossie