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ARCHIVED NEWS

Have you seen this alien?

19/12/2011

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Father Christmas, King Tides and now this... another invasive alien (weed) arrives in Queensland.

The Queensland Herbarium is asking everyone to keep an eye out for Praxelis clematidea, a weed of South American origin which is known to be highly invasive in most situations in north Queensland.

The plant forms dense swards and is not deterred by grazing as it is not eaten by stock. Like virtually all weeds, it is a particular threat in disturbed situations and roadsides.

It is easily confused with blue billygoat weed (Ageratum houstonianum) that is widespread on the island, but can be identified by differences in the shape of the flower heads, seeds and leaves.

The differences are demonstrated below.
Picture
(Image courtesy of DERM)

If you find any Praxelis, the Herbarium would like you to send a specimen to The Queensland Herbarium, Brisbane Botanic Gardens Mt Coot-tha, Mt Coot-tha Rd, Toowong, 4066.

For more information on collecting, call 38969318 or email queensland.herbarium@epa.qld.gov.au

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  • Home
  • About
    • History of MINCA
    • Become A Member
    • Renew Your Membership
  • Resources
    • Plants of Magnetic Island
    • Weeds of Magnetic Island
    • Favourite Trees
    • Native animals of Magnetic Island
    • Birds of Magnetic Island
    • Butterflies of Magnetic Island
    • Reptiles of Magnetic Island
    • Frogs (Amphians) of Magnetic Island
    • Spiders, Insects & Bugs of Magnetic Island
    • Life in the ocean around Magnetic Island
    • The geology of Magnetic Island
    • Library & Links
  • Projects
    • Bolger Bay Conservation Park
    • Protection of Radical Bay
    • Townsville Port expansion >
      • Flyer
    • Clear Water Townsville >
      • The Future of Cleveland Bay >
        • Historical Impacts of Silt Pollution
      • The Story So Far
      • Cleveland Bay: Current & Impacts
      • The Impact of Dredging
      • Dolphins, Dugongs & Turtles
      • Where Have All the Fish Gone?
      • Proposed Port Expansion & Master Plan
      • Port of Townsville's Changing Plans
      • How Many New Berths?
      • Big Enough Already!
      • Jobs and the Port
      • The $1.64 Billion Quesion: WHY?
      • Contact Clear Water Townsville
    • Freecycle
  • Achievements
    • 1996 Nelly Bay Habitat Reserve
    • 2010 'Carbon Cuts' Film Competition
    • 2010 Low Carbon Diet Inter-Bay Challenge
    • 2011 Short Film Competition
    • 2011 Anti-plastic Bag Campaign
    • ARCHIVE NEWS
  • Gallery
  • Contact
  • New Page