Weeds Index - Declared Weeds

The declared weeds list is available below. 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:

Table: Declared Agricultural and Environmental Weeds in Tasmania


Common Name


Scientific Name

African Boxthorn


Lycium ferocissimum
African Boxthorn (thumbnail) 

African Feather Grass


Pennisetum macrourum
African Feathergrass (thumbnail) 

African Lovegrass


Eragrostis curvula
African Lovegrass (thumbnail) 

African Thistle


Berkheya rigida
African Thistle (thumbnail) 

Alligator Weed


Alternanthera philoxeroides
Althernanthera Philox (thumbnail) 

Amsinckia species


Amsinckia species
Amsinckia (thumbnail) 

Apple-of-Sodom


Solanum sodomaeum
Apple of Sodom (thumbnail) 

Arrowhead



Sagittaria montevidensis
Arrowhead (thumbnail) 

Artichoke Thistle



Cynara cardunculus
Artichoke thistle (thumbnail) 

Asparagus Fern



Asparagus scandens
Asparagus Fern 

Athel Pine


Tamarix aphylla
Athelpine (thumbnail) 

Bathurst Burr


Xanthium
Bathurst Burr (thumbnail) 

Bear-skin Fescue


Festuca gautieri
Bearskin Fescue (thumbnail) 

Bifora


Bifora testiculata
Bifora Flower (thumbnail) 

Blackberry


Rubus fruticosus aggregate
Blackberry (thumbnail) 

Boneseed



Chrysanthemoides monilifera (including subspecies)
Boneseed (thumbnail) 

Bridal Creeper


Asparagus asparagoides (= Myrsiphyllum asparagoides)
Bridalcreeper (thumbnail) 

Broomrape


Orobanche species (except O. minor and O. cernua var. australiana)

Broomrape (thumbnail) 

Cabomba


Cabomba caroliniana
Fanwort (thumbnail) 

Californian Thistle


Cirsium arvense
Californian Thistle (thumbnail) 

Caltrop


Tribulus terrestris
Caltrop (thumbnail) 

Canadian Pondweed, Elodea


Elodea canadensis
Canadian Pondweed (thumbnail) 
Cane Needle Grass ​Nassella hyalina

Cape Tulips


Moraeaspecies
Cape Tulip (thumbnail) 

Chilean Needle Grass


Nassella neesiana
Chilean needlegrass  (thumbnail) 

Common crupina


Crupina vulgaris
Common crupina (thumbnail) 

Common heliotrope


Heliotropium europaeum
Common heliotrope (thumbnail) 

Cotton Thistles


Onopordum species
Onopordum thistles (thumbnail)

Creeping Knapweed


Acroptilon repens
Creeping Knapwood (thumbnail) 

Creeping Yellowcress


Rorippa sylvestris
Creeping yellowgrass (thumbnail) 

Crow Garlic


Allium vineale
Crow garlic (thumbnail) 

Cut Leaf Nightshade


Solanum triflorum
Cut leaf nightshade 

Darwin's Barberry


Berberis darwinii
Darwin's barberry (thumbnail) 

Datura


Datura species

   

Dodder


Cuscuta species (excluding Cuscuta tasmanica)
Dodder (thumbnail) 

Egeria, Dense Water Weed


Egeria densa (= Elodea densa)
Egeria (thumbnail) 

Elisha's Tears


Leycesteria formosa
Elisha's tears (thumbnails) 

English Broom


Cytisus scoparius
English Broom 

Espartillo


Amelichloa caudata (= Achnatherum caudatum)
Espartillo (thumbnail) 

False Cleavers


Galium spurium
False cleavers (thumbnail) 

False Yellowhead


Dittrichia viscosa
False yellowhead (thumbnail) 

Feathertop


Pennisetum villosum
Feathertop (thumbnail) 

Fennel


Foeniculum vulgare
Fennel 

Floating Water Chestnut


Trapa species
Floating water chestnut (thumbnail) 

Giant Hogweed


Heracleum mantegazzianum
Giant hogweed (thumbnail) 

Gorse


Ulex europaeus
Gorse (thumbnail) 

Hawkweed


Hieracium species
Hawkweed (thumbnail) 

Heather


Calluna vulgaris
Heather  (thumbnail) 

Holly-leaved senecio


Senecio glastifolius
Holly-leaved senecio (thumbnail) 

Horehound


Marrubium vulgare
Horehound (thumbnail) 

Hornwort


Ceratophyllum demersum
Hornwort (thumbnail) 

Horsetail


Equisetum species
Horsetail (thumbnail) 

Hydrilla


Hydrilla verticillata
Hydrilla (thumbnail) 

Hymenachne


Hymenachne amplexicaulis
Hymenachne (thumbnail) 

Innocent weed



Cenchrus longispinus
Innocent Weed (small)

Japanese Knotweed


Fallopia japonica
Japanese knotweed (thumbnail) 

Karamu


Coprosma robusta
Karamu (thumbnail) 

Kochia


Bassia scoparia (= Kochia scoparia)
Kochia (thumbnail) 

Lagarosiphon, Oxygen Weed


Lagarosiphon major
Lagarosiphon (thumbnail) 

Lantana


Lantana camara
Lantana (thumbnail) 
Lobed-Needle-Grass Nassella charruana
Lobed Needle Grass 

Mallee cockspur


Centaurea eriophora
Mallee Cockspur (thumbnail) 

Meadow Parsley


Oenanthe pimpinelloides
Meadow parsley (thumbnail) 

Mediterranean Daisy


Urospermum dalechampii
Mediterranean daisy (thumbnail) 

Mesquite


Prosopis species
Mesquite (thumbnail) 

               

Nassella tenuissima


Miconia



Miconia
species
Miconia (thumbnail) 

Montpellier Broom


Genista monspessulana
Montpellier broom (thumbnail) 

New Zealand Sedges


Carex albula, C. buchananii, C. flagellifera and C. testacea
New Zealand sedge (thumbnail) 

Nodding Thistle


Carduus nutans
Nodding thistle (thumbnail)

Onion Weed


Asphodelus fistulosus
Onion weed (thumbnail)

Pampas Grasses


Cortaderia species
Pampas (thumbnail)

Pampas Lily-of-the-Valley


Salpichroa origanifolia
Pampas Lily of the Valley (thumbnail) 

Parkinsonia


(Parkinsoniaaculeata)
Parkinsonia (thumbnail)
ParodiEleocharis parodii    
 

Parrot's Feather


Myriophyllum aquaticum (= M. brasiliense)
Parrot's feather (thumbnail)
Parthenium​(Parthenium hysterophorus)Parthenium (thumbnail)

Paterson's Curse


Echium plantagineum L.
Paterson's curse (thumbnail)

Pond apple



(Annona glabra)
Pond apple (thumbnail)

Prickly acacia



Acacia nilotica ssp. indica)
Prickly acacia (thumbnail) 
​Purple Nut GrassCyperus rotundusPurple Nut Grass (thumbnail)

Ragwort


Senecio jacobaea
Ragwort (thumbnail) 
Rubber vineCryptostegia grandifloRubber vine (thumbnail)

Saffron Thistle


Carthamus lanatus L.
Saffron thistle (thumbnail) 

Sagittaria


Sagittaria platyphylla
Sagittaria graminea 
SalviniaSalvinia molestaSalvinia (thumbnail)

Senegal Tea Plant, Temple Plant


Gymnocoronis spilanthoides
Senegal tea plant (thumbnail) 
Serrated TussockNassella trichotomaSerrated tussock (thumbnail)

Silver-leaf Nightshade


Solanum elaeagnifolium
Silver-leaf nightshade (thumbnail) 

Skeleton Weed


Chondrilla juncea
Skeleton weed (thumbnail) 

Slender Thistle


Carduus pycnocephalus

Carduus tenuiflorus

Slender thistle (thumbnail) 
Spanish HeathErica lusitanicaSpanish heath (thumbnail)

Spiny Burrgrass


Cenchrus longispinus
Spiny Burrgrass (thumbnail) 

Spiny Burrgrass


Cenchrus incertus (= Cenchrus pauciflorus)
Spiny Burrgrass (thumbnail) 

Spiny Emex


Emex australis
Spiny Emex (thumbnail) 

Square stemmed St John's wort


Hypericum tetrapterum
Square-stemmed St Johns Wort (thumbnail) 

St John's Wort


Hypericum perforatum
St Johns Wort (thumbnail) 

Star Thistle


Centaurea calcitrapa
Star thistle (thumbnail) 

Stemless Thistle


Onopordum acaulon
Stemless thistle

Stinking Mayweed


Anthemis cotula
Stinking mayweed (thumbnail) 


Texas Needle Grass


  Nassella leucotricha


Three-horned bedstraw


Galium tricornutum
Three-horned bedstraw (thumbnail) 

Tumbleweed


Amaranthus albus
Tumbleweed (thumbnail) 

Viper's bugloss


Echium vulgare L.
Paterson's curse (thumbnail) 

Water hyacinth


Eichhornia crassipes
Water Hyacinth (thumbnail) 

White Spanish broom


Cytisus multiflorus
White Spanish Broom 

Whiteweed (Hoary Cress)


Cardaria draba
Whiteweed (hoary cress) (thumbnail) 

White-edged nightshade


Solanum marginatum
White-edge nightshade (thumbnail) 

Wild rice


Zizania species
Wild rice (thumbnail) 

Willows



(Salix species, excluding S. babylonica, S. x calodendron and S. x reichardtii )
Willows (thumbnail) 

Winged sender thistle

Carduus Tenufloris
Winged slender thistle

Witchweed


Striga species (all non-indigenous species)
Witchweed (thumbnail) 

Yellow Nut Grass/Yellow Nut Sedge


Cyperus esculentus
Yellow nut grass (thumbnail) 



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