Scientific name: Senecio madagascariensis
Family: Asteraceae
Status: It is a Weed of National Significance in the ACT, NSW, QLD and WA.

General Information: African Fire Weed is a daisy-like herb which is native to South Africa but was first recorded in 1918 in the Hunter Valley, Australia, and likely arrived in the ballast of ships. It spreads slowly at first, but in the past 30 years, has rapidly increased its range, as it is a highly invasive plant that on average, can produce 10,000 seeds per year. The plant contains toxic alkaloids that can cause liver damage to livestock.

Control: It is the responsibility of the owners and occupants of private land to ensure effective measures are taken to control infestations. This weed is quite common around the greater Long Reef area and occasionally due to wind blown seeds, this weed turns up on Reefcare’s site at the headland.

Scientific name: Asparagus aethiopicus
Family: Asparagaceae
Status: It is declared a weed of National Significance

General Information: Asparagus fern is considered one of Australia’s worst weeds as it out competes native vegetation and prevents new plants from establishing. It grows into large, thick masses several meters across with impenetrable thickets, often along fence lines and in Lomandara at our site, making removal difficult.

Control: It is a huge problem at Long Reef as there are 1000’s of seedlings across the site that have been spread through birds dropping seeds, and underground roots of tubers and rhizomes which propagate if any fragment is left. Eradication requires long term integrated management strategies, including mechanical removal, chemical treatments and monitoring to prevent fruiting and seed spread.

Scientific name: Parietaria judaica
Family: Malvaceae
Status: It is decalred a Class 4 noxious weed in the Sydney area.

General Information: This is a perennial herb with erect, reddish-green stems about 1m tall and is common along roadsides and in gardens, especially near seepage. It produces a greenish female flower and bisexual flowers with pollen that can cause a severe allergic reaction in some people, hence its common name. It spreads mainly through seed dispersal by animals, people and machinery.

Control: Private land owners are expected to take effective measures to control infestations. This weed was not seen at Reefcare's site until 2020 when the Northern Beaches Council had contractors clear an area bottom-west of the main track to plant coastal species, and we have been trying to control it since.

Scientific name: Parapholis incurva
Family: Poaceae
Status: Naturalised in the southern half of Australia, Tasmania and the Bass Strait islands

General Information: Barbed Grass is a tufted annual that grows up to 30 cm high, with green flowers from September to December and then fruits October–December. It is native in Western Europe, Asia and Northern Africa but is widely naturalised across the world.

Control: It is quite easy to pull out, but to be time economical with a big infestation, spraying when in the growth stage around September is best. It likes saline soils subject to flooding, or coastal sandy and rocky places, hence it is no surprise that it appeared at the top of Long Reef at the whale sculpture in 2023. Now in 2026, it can be found heading out from each side of the track (mainly the northern side) to the bottom of the track into our lovely north-eastern dune area.

Scientific name: Chrysanthemoides Monilifera subsp. rotundata
Family: Asteraceae
Status: A weed of National Significance

General Information: Bitou Bush is a native of South Africa but can be found all along the Eastern coast of Australia, with almost pure stands of 220km totaling around 70,000 hectares. It was initially recorded in 1908 near Newcastle, but from 1946 it was deliberately planted to aid in erosion control and post-mining rehabilitation. It is an aggressive weed that can out compete and eliminate native coastal dune vegetation, and can produce up to 50,000+ seeds per plant that have up to 2 years viability.

Control: The NB Council introduced the bitou leaf roller moth 12 years ago which feeds on the plant but the bulk of the elimination at Long Reef is through physical work by Reefcare volunteers using the ‘cutting and painting’ technique.

Scientific name: Solanum nigrum
Family: Solanaceae
Status: It is an environmental weed in Victoria, New South Wales, W.A., QLD and N.T.

General Information: Blackberry nightshade is a serious agricultural weed in 61 countries that competes with crops and native vegetation as it produces a large quantity of seeds with high viability and is drought-tolerant. It thrives in a variety of environments, including coastal areas such as Long Reef and disturbed sites like roadsides. The plant is revered for its medicinal properties dating back to ancient Greece and was cultivated in Africa, North America, and 15th-century China during famine, but it also feared for its poisonous uncooked leaves and berries.

Control: At Long Reef it is a target species that we pull out before it spreads, often around autumn, and it needs to be bagged whenever the plant has green or black berries.

Scientific name: Bromus catharticus
Family: Poaceae
Status: Naturalised in all Australian states except the N.T.

General Information: Bromus Grass can be distinguished from other grass genera through its mostly closed leaf sheaths and awns which are inserted near an apex, closing the flowers for self-pollination. It grows in open, disturbed and natural areas, such as roadsides, orchards, and grasslands. It mainly spreads through contaminated agricultural produce and attachment to vehicles, clothing, shoes or equipment, which is probably how this came to Long Reef in 2019.

Control: Bromus can produce an average of 1000 seeds/m2, viable in the soil for up to three years, so when it flowers at Long Reef Aug-Oct, we target and bag the seed heads, pull the plant from the ground easily and then the leaves are left to rot.