Blue Billygoat Weed
Blue billygoat weed (Ageratum houstonianum) is regarded as an environmental weed in Queensland and New South Wales.
Also known as ageratum, blue billy goat weed, blue billygoat weed, blue top or flossflower.
This weed can often be found in bushland, gardens, roadsides, disturbed sites, waste areas, pastures, crops, wetlands and waterways in the tropical, sub-tropical and warmer temperate regions of Australia.
While considered an invasive weed, and like most weeds can be a source of food for bees to forage.