Mysore raspberry

Also known as White blackberry or Hill raspberry, Mysore raspberry is originally from India and South-East Asia. It forms dense, impenetrable thickets and has become invasive in some areas where it has been introduced, including Hawaii and the Galapagos Islands. It is a Class 3 noxious weed around the North Coast region. Mysore raspberry is a large scrambling shrub, 3-4.5 metres high, with sharp, hooked thorns. Its leaves are hairy and made up of from five leaflets to nine leaflets, 2.5-6 cm long, with toothed edges. The upper side is dark green while the underside is white Pink or mauve […]

mahonia with fruit 

Mahonia

Mahonia, also known as Chinese holly grape, is a native of China and has been introduced to many countries as a garden plant. It has invaded bushland and pasture on the Dorrigo Plateau. This is the first time it has been known to naturalise (reproduce in the wild) in Australia, but its apparent rapid spread indicates potential for it to have significant impact. It has also been identified as a potential problem in New Zealand. Mahonia is listed as a Class 3 noxious weed across the North Coast and Northern Tablelands of NSW. A shrub, generally up to four metres […]

 

Long-leaf willow primrose

Long-leaf willow primrose is an invasive aquatic plant from South America which forms dense colonies in slow-moving and static waterways. It was first introduced to Australia as an ornamental plant, and has invaded wetlands and riparian areas near Sydney, on the Central Coast of NSW and near Brisbane, in Queensland. If no control action is taken it will dominate temperate and tropical wetland and riparian systems throughout Australia, according to the NSW Department of Primary Industries. Long-leaf willow primrose is a Class 2 noxious weed across the North Coast, except for the Nambucca local-government area where it is Class 1. […]

prickly pear 

Prickly pear

Prickly pear is an erect shrub, growing to about one metre (rarely to two metres) high. True leaves are shed early and stem segments are often incorrectly referred to as leaves. Fruit are egg-shaped with a depressed top. They are purple when ripe and edible. Seeds are pale brown, to five millimetes long. Lower segments of the stem may be thickened and trunk-forming on older plants while flattened upper segments are up to 40 cm long and up to 25 cm wide. Yellow flowers are about six centimetres wide, mostly on the margins of the fleshy segments and occur in […]

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 […]

 

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 […]

 

Yellow bells

Yellow bells is a small shrub growing between three metres and eight metres tall. It is vase shaped with a rounded top and it can be multi-stemmed. An escaped garden plant, it is a serious threat to native riparian vegetation. The stem is smooth with squarish twigs which are green, turning tan or reddish tan as they age. The bark on the main trunk is light brown. Leaves are compound, with linear serrate leaflets about two centimetres wide. They are glossy bright green and have a tropical look. The plant has clusters of bright yellow trumpet-shaped flowers on terminal portions […]

Narrow-leaf privet

Narrow-leaf privet is a much-branched, hardy, evergreen, fast-growing shrub up to four metres tall, formerly used extensively for hedging. Sprays of small, round blue-black berries persist into winter. Its stems are covered in lenticels (white dots). It is a tall multi-stemmed shrub. Leaves are dark green ovals with a pointed tip, to 6cm long and often have a wavy margin. Masses of heavily-scented tiny white tubular flowers occur in drooping sprays in spring; they are highly allergenic. One plant may produce up to a million seeds, which are spread into bushland by birds, and are also washed down waterways. Narrow-leaf […]

 

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 […]