​​​​​​​​​The declared weeds list is available below, sorted alphabetically by common name. Follow the links to find information on the weeds, including images for identification and control guides plus information sheets and management plans (where available). Note: Property managers are required by law to control declared weeds.
 
See also:

• Weeds Index - declared sorted alphabetically by scientific name
• Non-declared Agricultural and Environmental Weeds in Tasmania
• Search the Dennis Morris Weeds On-line Database for illustrations of many weed species.

Table: Declared Weeds in Tasmania

Common Name	Scientific Name	​
African Boxthorn	Lycium ferocissimum
African Feather Grass	Cenchrus macrourus(syn. Pennisetum macrourum)
African Lovegrass	Eragrostis curvula
African Thistle	Berkheya rigida
Alligator Weed	Alternanthera philoxeroides
Amsinckia species	Amsinckia species
​Angled Heath	​Erica quadrangularis
Apple-of-Sodom	Solanum sodomaeum
Arrowhead	Sagittaria montevidensis
Artichoke Thistle	Cynara cardunculus
Asparagus Fern​	Asparagus scandens
Athel Pine	Tamarix aphylla
Bathurst Burr	Xanthium
Bear-skin Fescue	Festuca gautieri
​Bell Heather	​Erica cinerea
​​Bellyache Bush	​Jatropha gossypiifolia	​;
​​Berry Heath	​Erica baccans
​​Besom Heath	​Erica scoparia
​​Bicolored Heath	​Erica discolor
​ Bifora	Bifora testiculata
Blackberry	Rubus fruticosus aggregate
Boneseed	Chrysanthemoides monilifera (including subspecies)
Bridal Creeper	Asparagus asparagoides
​Bridal Veil	​Asparagus declinatus
​ Broomrape	Orobanche species (except O. minor and O. cernua var. australiana)	​
Cabomba	Cabomba caroliniana
Californian Thistle	Cirsium arvense
Caltrop	Tribulus terrestris
Canadian Pondweed, Elodea	Elodea canadensis
Cane Needle Grass	​Nassella hyalina
Cape Tulips	Moraea species
​Cat's Claw Creeper	​Dolichandra unguis-cati​
​ Chilean Needle Grass	Nassella neesiana
​​Climbing Asparagus	​Asparagus africanus
​Climbing Asparagus Fern	​Asparagus plumosus
​ Common Crupina	Crupina vulgaris
Common Heliotrope	Heliotropium europaeum
​Cornish Heath	​Erica vagans	​
​​Corsican Heath	​Erica terminalis	​​
​ Cotton Thistles	Onopordum species
Creeping Knapweed	Acroptilon repens
Creeping Yellowcress	Rorippa sylvestris
​Cross-leaved Heath	​Erica tetralix
​ Crow Garlic	Allium vineale
Cut-Leaf Nightshade	Solanum triflorum
Darwin's Barberry	Berberis darwinii
Datura	Datura species
Dodder	Cuscuta species (excluding Cuscuta tasmanica)
​Dorset Heath	​Erica ciliaris
​ Egeria, Dense Water Weed	Egeria densa (syn. Elodea densa)
Elisha's Tears	Leycesteria formosa
English Broom​	Cytisus scoparius
​Erica species	​Erica glandulosa	​
​​​Erica species	​Erica holosericea	​
​​​Erica species	​Erica melanthera	​
​ Espartillo	Amelichloa caudata (syn. Achnatherum caudatum)
False Cleavers	Galium spurium
False Yellowhead	Dittrichia viscosa
Feathertop	Cenchrus longisetus(syn. Pennisetum villosum)
Fennel	Foeniculum vulgare
​Fireweed	​Senecio madagascariensis	​​​
​​Flax-leaf Broom	​Genista linifolia
​ Floating Water Chestnut	Trapa species
​Gamba Grass	​Andropogon gayanus	​
​ Giant Hogweed	Heracleum mantegazzianum
Gorse	Ulex europaeus
​Ground Asparagus	​Asparagus aethiopicus	​
​ Hawkweed	Hieracium (syn. Pilosella) species
Heather	Calluna vulgaris
​Holly	​Ilex aquifolium
​ Holly-leaved Senecio	Senecio glastifolius
Horehound	Marrubium vulgare
Hornwort	Ceratophyllum demersum
Horsetail	Equisetum species
Hydrilla	Hydrilla verticillata
Hymenachne	Hymenachne amplexicaulis and Hymenachne x calamitosa	​​​
Innocent Weed (Spiny Burrgrass)	Cenchrus longispinus
​Irish Heath	​Erica erigena	​​
​ Japanese Knotweed	Fallopia japonica
Karamu	Coprosma robusta
Kochia	Bassia scoparia (syn. Kochia scoparia)
Lagarosiphon (Oxygen Weed)	Lagarosiphon major
Lantana	Lantana camara
​Lobed Needle Grass	​Nassella charruana
​Madeira Vine	​Anredera cordifolia	​​
​ Mallee Cockspur	Centaurea eriophora
Meadow Parsley	Oenanthe pimpinelloides
Mediterranean Daisy	Urospermum dalechampii
Mesquite	Prosopis species
Mexican Feather Grass	​ Nassella tenuissima
Miconia	Miconia species
​Mimosa	​Mimosa pigra
Montpellier Broom	Genista monspessulana	​
New Zealand Sedges	Carex albula, C. buchananii, C. flagellifera and C. testacea
Nodding Thistle	Carduus nutans
Onion Weed	Asphodelus fistulosus
​Opuntioid Cacti	​Austrocylindropuntia species
​​Opuntioid Cacti	​Cylindropuntia species
​​Opuntioid Cacti	​Opuntia species (excluding Opuntia ficus-indica)	​
​ Pampas Grasses	Cortaderia species
Pampas Lily-of-the-Valley	Salpichroa origanifolia
Parkinsonia	Parkinsonia aculeata
​ Parodi	​ Eleocharis parodii
​ Parrot's Feather	Myriophyllum aquaticum (syn. M. brasiliense)
​Parthenium Weed	Parthenium hysterophorus	​
Paterson's Curse	Echium plantagineum L.
Pond Apple	Annona glabra
Prickly Acacia	Acacia nilotica ssp. indica
​Purple Nut Grass	​​Cyperus rot​ undus	​
Ragwort	Senecio jacobaea
​​​Rubber Vine	​Cryptostegia grandiflo	​
Saffron Thistle	Carthamus lanatus L.
Sagittaria	Sagittaria platyphylla (syn. Sagittaria graminea)
​Salvinia	​Salvinia molesta	​
Senegal Tea Plant, Temple Plant	Gymnocoronis spilanthoides
​Serrated Tussock	​Nassella trichotoma	​
Silver-leaf Nightshade	Solanum elaeagnifolium
Skeleton Weed	Chondrilla juncea
Slender Thistle	Carduus pycnocephalus and Carduus tenuiflorus
​Spanish Heath	​Erica lusitanica	​
Spiny Burrgrass, (Innocent Weed)	Cenchrus longispinus and Cenchrus incertus
Spiny Emex	Emex australis
Square Stemmed St John's Wort	Hypericum tetrapterum
St John's Wort	Hypericum perforatum
Star Thistle	Centaurea calcitrapa
Stemless Thistle	Onopordum acaulon
Stinking Mayweed	Anthemis cotula
Texas Needle Grass	Nassella leucotricha
Three-horned Bedstraw	Galium tricornutum
​Tree Heath	​Erica arborea
​ Tumbleweed	Amaranthus albus
Viper's Bugloss	Echium vulgare L.
​Water Heath	​Erica caffra
​ Water Hyacinth	Eichhornia crassipes
​Western Cape Bridal Creeper	​Asparagus asparagoides Western Cape form
White Spanish Broom	Cytisus multiflorus
Whiteweed (Hoary Cress)	Lepidium draba
White-edged Nightshade	Solanum marginatum	​
Wild Rice	Zizania species
Willows	(Salix species, excluding S. babylonica, S. x calodendron and S. x reichardtii )
​Winter Heath	​Erica carnea
​ Witchweed	Striga species (all non-indigenous species)
Yellow Nut Grass / Yellow Nut Sedge	Cyperus esculentus