List of invasive plant species in the Northern Territory

Numerous plants have been introduced to the Northern Territory of Australia since colonisation began in the 1860s. Many have become invasive species or noxious weeds which by definition compete with native plants and suppress the growth of indigenous populations of both plants and animals.

A weed is broadly considered to be a plant that requires some form of action to reduce its negative effects on the economy, the environment and human health or amenity. XXX weeds are declared under legislative controls to reduce their impacts.

Weed classification

The Weeds Management Act 2001 defines three classes of weeds:

• Class A: to be eradicated
• Class B: control, growth and spread to be prevented
• Class C: prevent entry, not to be introduced into the Northern Territory

All class A and class B weeds are also included as class C weeds.

Lists

Declared weeds

Botanical name	Common name	Declaration class
Alternanthera philoxeroides	Alligator weed	A
Andropogon gayanus	Gamba grass	A
Annona glabra	Pond apple	A
Asphodelus fistulosus	Onion weed	A
Austrocylindropuntia spp.	Opuntioid cacti	A
Barleria prionitis	Barleria	A
Cabomba spp.	Cabomba	A
Chrysanthemoides monilifera	Bitou bush, boneseed	A
Cryptostegia spp.	Rubber vines	A
Cylindropuntia spp.	Opuntioid cacti, rope cacti	A
Dalbergia sissoo	Longspine thornapple	A
Datura ferox	Dalbergia	A
Dolichandra unguis-cati syn. Macfadyena unguis-cati	Cat's claw creeper	A
Echium plantagineum	Paterson's curse	A
Eichhornia crassipes	Water hyacinth	A
Hyparrhenia rufa	Thatch grass	A
Jatropha curcas	Physic nut	A
Jatropha gossypiifolia	Bellyache bush	A
Lycium ferocissimum	African boxthorn	A
Martynia annua	Devil's claw	A
Mimosa pigra	Mimosa	A
Myriophyllum aquaticum	Parrot's feather	A
Nassella neesiana	Chilean needle grass	A
Nassella tenuissima	Mexican feather grass	A
Nassella trichotoma	Serrated tussock	A
Neptunia plena	Water mimosa	A
Neptunia oleraceae	Water mimosa	A
Opuntia spp.	Prickly pears	A
Parthenium hysterophorus	Parthenium weed	A
Pereskia aculeata	Leaf cactus	A
Prosopis spp.	Mesquite	A
Rubus fruticose agg.	Blackberry	A
Sagittaria platyphylla	Sagittaria	A
Salix spp.	Willows	A
Schinus terebinthifolius	Brazilian pepper	A
Senegalia catechu syn. Acacia catechu	Cutch tree	A
Tamarix aphylla	Athel pine	A
Ulex europaeus	Gorse	A
Vachellia nilotica syn. Acacia nilotica	Prickly acacia	A
Ziziphus mauritiana	Chinee apple, Indian jujube	A

See also

• Weeds of National Significance
• Invasive species in Australia