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Weeds of National Significance & Declared Weed List (PDF format)

1. Acacia bailyeana, A. dealbata, A. decurrens and A. elata
   to name just a few and all native to eastern Australia. Widely planted in the seventies were eastern Australian acacias

2. Acacia podalyriifolia - 'Queensland silver wattle' loves the laterite soils of the southwest and is leaping out of gardens into the bush
3. Acacia iteaphylla - 'Flinders Range wattle' is another wattle that loves the laterite soils here

4. Bulb - Babiana stricta  and Babiana disticha  - 'Baboon flowers', highly invasive in Perth’s heavier soils

5. Chamelaucium uncinatum - 'Geraldton Wax' - ‘Informed choice is the key’

   pdf on Woody Weeds

6. Colocasia esculenta - 'Taro' or 'Elephant Ears' 'Summer monsters - The aquatic weed from hell!'

   EWAN link for brochure 

7. Cortaderia selloana - 'Pampas grass' Later, and to this day, “fashions” played a role e.g. the fashion statement of the late 60s, early 70s…

   WSWA - Murdoch Pampas brochure        

8. Dieties grandiflora - 'Native Iris' or 'Spanish Iris' -  Note: This is not an Australian Plant

9. Eichhorina crassipes - Water hyacinth - Another fishpond favourite from South America             

10. Equisetum arvense & Equisetum hyemale - Highly Invasive and virtually impossible to remove once established

11. Eucalyptus citriodora and Eucalyptus cladocalyx
    Even Eucalyptus species have proven weedy outside their native range

12. Bulb - Ferraria crispa - 'Black Flag' is very invasive and almost impossible to eradicate once established

13. Bulb - Freesia alba x leichtlinii also known as Freesia x hybrida in Australia -  Large numbers of hybrid freesias are found in dense infestations in Kings Park, they love the poor sandy soils of the coastal plain Many common gardens, bulbs are bushland weeds, gladiolus, freesia, chincherinchee     

    pdf on freesias

14. Gaura lindheimeri - 'Butterfly Plant' -  ‘This will become a nightmare for Friends groups’       

15. Hydrocotyle ranunculoides - hydrocotyl - Introduced as an aquarium plant, later to infest several kilometres of the Canning River, Perth, Western Australia

16. Ipomoea indica - 'Morning Glory' - Summer monsters - The vines from hell!’

17. Bulb - Ixia polystachya & Ixia hybrid & Ixia maculata

18. Bulb - Lachenalia aloides - Invading Perth’s bushland and very difficult to control -

19. Lantana camara - WONS (Media Release)

20. Lavendula stoechas - 'Lavender'  ‘Herbs, popularity has its price’

21. Lomandra longifolia - 'Long leaf mat rush' - 'The potential to replace arum lily' - Tim Lowe   

22. Mentha pulegium - 'Pennyroyal' Culinary and medicinal herbs are another source of weeds

23. Mimosa pigra

24. Olea europea - 'Olive' - ‘The ‘Peace Tree’ is a major environmental weed’

    pdf on Woody Weeds

25. Pennisetum setaceum - native to Mediterranean region
26. Pennisetum alopecuroides - native to east coast of Australia

    Warning  – P. alopecuroides is known to strongly self-seed. Therefore it is advisable to cut off the flower heads before they shed their seeds and not to plant the grass near bushland. It has the potential to be invasive in some areas

27. Bulb - Romulea flava & Romulea minutiflora & Romulea rosea

28. Sagittaria platyphylla - sagittaria was unknown in WA until it was found growing in a drain flowing into the Canning River

29. Salix spp - 'Willows'  

    pdf on Woody Weeds

30. Salvinia molesta

31. Schinus terebinthifolius  - 'Pepper Tree' - ‘Summer monsters - The tree from hell!’

    pdf on Woody Weed

32. Sphagneticola trilobata  (previously Wedelia) 'Singapore daisy', frequently described as ‘foolproof’ for very good reason

33. Watsonia sp. In the early days, gardeners grew what was easy, what they could get hold of

    EWAN link for brochure  

34. Zanthedeschia aethiopica - 'Arum Lily'

    pdf on Arum Lily