From a database compiled of alien species over the years.
Alien is defined as not indigenous to the Cape Peninsula. The list includes all species that maintain themselves, whether ruderal, invasive or opportunistic.
Red Water Fern Rivers and vleis locally abundant
Kariba Weed Vleis , pools, on Cape Flats; locally dominant
Common Tree Fern Not recorded in 1950; was Cyathea dregei
Australian Tree Fern Not recorded in 1950; was Cyathea cooperi
Tender Brake Not recorded in 1950
Rough Maidenhair Fern Not recorded in 1950
Rads Maidenhair Fern Not recorded in 1950
Sword Fern Forest margins and wet areas; rare, locally dominant
Fragrant Fern Not recorded in 1950; From SAPIA 2010; on boulders and trunks; previously in Polypodium and Phymatosorus
Monterey Cypress Commonly planted
Coast Redwood Planted; escaping at Silvermine
Swamp Cypress Wetlands, in water; at Tokai
Japanese Cedar Not recorded in 1950
Radiata Pine Mountains; very common and dominant where not controlled
Canary Pine Mountains, granites and sandstones, widespread; infrequent
Stone Pine Flats and lower slopes; spreads slowly; common
Aleppo Pine Mainly Signal Hill and Devils Peak; infrequent
Cluster Pine Mountains; very common and dominant where not controlled
Outeniqua Yellowwood Invading forests and old plantations; rare, locally dominant; a Garden Route invader
Breeriver Yellowwood Local at Newlands, Tokai, Soetvlei; rare; the indigenous P. latifolius has leaves 5-13mm X 60-150mm
Peanutbutter Cassia From SAPIA 2010; disturbed areas; from Somerset West
Peanut Butter Weed Not recorded in 1950
Honey Mesquite From SAPIA 2010; Cape Flats; water courses; hybridizes with other spp making ID difficult
Velvet Mesquite From SAPIA 2010; was Prosopis glandulosa var. velutina; hybridizes with other Prosopis
Green Wattle Granite Fynbos, roadsides, disturbed areas; occasional, but large impact; Kirstenbosch to Tokai; not recorded in 1950
Silver Wattle Kirstenbosch and Newlands; not setting seed in 1950
Baileys Wattle Not recorded in 1950
Black Wattle In 1950 casual on roadsides; Groote Schuur and Camps Bay
Longleaf Wattle Very common on flats
Hop Wattle From SAPIA 2010; a problem in Knysna
Wallangara Wattle From SAPIA 2010; grows on granites in Australia
Kangaroo Thorn Shale Fynbos; rare; lower slopes of Devils Peak
Pearl Wattle Sandy soil; occasional; Tokai
Golden Wattle Roadside; Wildschutsbrand, Devils Peak and Pinelands
Port Jackson Wattle Flats and hill slopes; very common
Sticky Wattle Not recorded in 1950
Screw-pod Wattle Sandy soil; occasional, forming dense stands from root coppice; Tokai
Narrow-leaf Bower Wattle Not recorded in 1950
Australian Blackwood Kloofs and forests; locally plentiful; Tokai, Devils Peak and Spilhaus Ravine
Rooikrans Very common on flats
Woolly Clover Roadsides and waste areas; rather common
Reversed Clover Damp areas in fields and commons; occasional
Suffocated Clover Fields and commons; occasional
Fenugreek Fields and commons; occasional