Cecropia

Cecropia are rapidly growing trees originating from tropical America. They are pioneer species that can quickly establish in disturbed areas and have become weeds in South America, Malaysia and Africa. In the past, Cecropia species (including Cecropia peltata) have been imported into Australia for private plant collections, but all known plants have been destroyed due to their invasive potential. They are listed as Class 2 noxious weeds across the North Coast region. They are a rapidly growing tree, usually 10-20 metres tall, but can reach up to 25 metres. The plants can be distinguished by the large U-shaped leaf scars […]

 

Cockspur coral tree

Cockspur coral tree (also known as Cocks comb coral tree) is a deciduous shrub or tree from South America. Originating from northern Argentina, eastern Brazil, Bolivia, Paraguay and Uruguay, it can grow to 10 metres. It has been commonly grown in Australia as an ornamental plant and has become invasive along waterways in coastal NSW north of Sydney. It is gazetted as a Class 3 noxious weed in the Bellingen, Nambucca, Coffs Harbour and Clarence Valley local-government areas and as a Class 4 noxious weed on the Far North Coast. It usually grows to between five metres and eight metres […]

Serrated Tussock infestation 

Serrated tussock

Serrated tussock (formerly Stipa trichotoma) is a large, long-lived tussock grass about 50 cm high and 15 cm to 25 cm diameter at the base. Mature plants have drooping leaves that may extend plant diameter to 75 cm. Stems are much-branched, initially erect and up to 95 cm long, twice as long as the leaves. They droop at maturity to touch the ground and have shallot-like bases. The many leaves are thin, fine, 0.5 mm in diameter and up to 50 cm long. They are tightly rolled, appearing circular in cross-section, with small serrations. The leaves are green in summer, […]

groundsel bush 

Groundsel bush

Groundsel bush is an environmental weed and a forestry weed because it readily invades forests and bushland. It is a densely-branched shrub, usually between 1.5 metres and three metres high, although it sometimes grows into a small tree up to seven metres high. Its small branches are striated and hairless. Groundsel has wedge-shaped leaves, usually with a few large teeth towards the apex. They are up to about 5 cm long and up to 4 cm wide on a stalk to 1.5 cm long. Leaves are dull green or pale green, waxy to touch and alternate. Stems are green at […]

 

Crofton weed

Crofton weed is a rapid-spreading weed that has become a nuisance in many areas along the eastern coast of Australia. It is particularly invasive on cleared land that is not grazed, such as public reserves, and causes particular problems for horse owners. A member of the Asteraceae or daisy family, Crofton weed is a native of Mexico. It is present as a weed in India, Sri Lanka, the Canary Islands, Jamaica, mainland United States, Hawaii, Fiji, New Zealand and Australia. Since its escape from ornamental cultivation in Australia about 1900, it has become widespread in Queensland coastal areas, on the […]

 

Koster’s curse

Koster’s curse is a declared Class 1 Noxious Weed in NSW and is the target of a national eradication program. It is a highly invasive shrub, growing up to five metres tall and has the potential to spread rapidly over many parts of Australia. Koster’s curse forms dense thickets, which can smother pasture and native vegetation in a similar manner to lantana. It is quick-growing and could cause major problems for primary industries. It invades disturbed areas including the edges of clearings and stream-banks, along fence lines, paths and roadways. The weed prefers humid tropical lowlands and therefore could spread […]

 

Fireweed

Fireweed is a highly invasive and opportunistic weed, native to south-eastern Africa. It quickly colonises overgrazed pastures and disturbed areas. It is a serious pasture weed of coastal NSW. It is able to grow on most soil types and in all aspects. It forms a persistent seedbank if not controlled before it flowers and can rapidly take over heavily grazed and neglected pastures, competing strongly with existing pasture plants. It seeds prolifically and grows to maturity quickly. Density is influenced by groundcover and competition, especially in autumn. Fireweed can quickly establish where ground has been cultivated or disturbed, or where […]

 

Bitou bush

Bitou bush was once used to stabilise sand dunes, but has now become a significant weed in coastal areas. It is rated as the worst pest plant in the Australian coastal environment, restricting access to beaches and destroying native bushland. Where bitou bush invades the impacts include a decline in native plant communities; a decline in floral biodiversity; changes in the diversity of birds, mammals and ground-dwelling insects and harbouring of pest animals like foxes and introduced birds which disperse the seeds. Native to South Africa, bitou bush first found its way to Australia in 1908, dumped as ballast from ships […]

 

Broad-leaf privet

Broad-leaf privet originates from eastern Asia and has become a widespread weed of disturbed land, pastoral areas and native bushland in coastal NSW. It grows as an evergreen shrub or small tree to a height of 4-10 metres. The brown bark is covered in small white lenticels (pores that allow gas exchange). Pointed oval-shaped leaves occur in opposite pairs, and are 4-13 cm long and 3-6 cm wide. The upper leaf surface is dark green and glossy or shiny, while the under-surface is paler with distinct veins. Leaves are hairless. Cream or white tubular flowers with four petal-like lobes occur […]