Yet Another New Weed

In past posts I have mentioned how the 19/20 bush fires had caused a whole raft of new species of weed growth in the burnt areas.
We had got rid of those with herbicide treatment and with substantial rain and even flooding had expected the pasture to reclaim the affected areas.
But no!
Another plant unknown to us began to take over those bare areas and was especially thick along the riparian zone.
So once again we "attacked" with herbicide over a number of weeks with almost total success.
But what was this plant?
Internet searches failed to find it so I emailed a picture to our local land services department and got an answer back the next day.

Turns out to be a native plant commonly known as Indian Weed with the scientific name, Sigesbeckia australiensis.

According to habitat data, it grows in moist and shady places, particularly on creek and river banks. That's us!

It is also prevalent in eucalypt woodland, vine forest and the margins of rain forest, on a range of soils and at altitudes from sea level to at least 1050m. 

It is considered a minor weed of disturbed ground and agricultural systems.

So what is a weed?

A weed is any plant which has a negative impact and requires human action to control it. The negative effects of weeds can be on the environment, economy, human health, or the amenity of gardens and landscaping. 

Weeds can also be a native or introduced species.

Native plants are usually considered weeds when they move from their natural habitat to a new area and begin to take over. Again that was us.