Plants of South Eastern New South Wales

Ageratina adenophora

Flowers and leaves. Photographer Don Wood, Bellbird Creek north of Eden

Flower heads. Photographer Richard Spellenberg, California, USA

Flowering stems. Australian Plant Image Index, photographer JM Randall, USA

Common name

Crofton weed

Family

Asteraceae

Where found

Forest, woodland, grassy areas, roadsides, disturbed sites and along streams. Coastal. Ranges and the eastern edge of the tablelands north of Nowra.

Notes

Introduced upright perennial herb or shrub to 3 m tall, producing numerous stems from a woody rootstock. Stems green, reddish or purplish, sticky hairy when young. Leaves opposite each other, 4-15 cm long, 30-90 mm wide, mostly hairless, margins toothed, tips.pointed. Flower heads 2-8 mm in diameter, bell shaped, with 40-50 white florets with 0 'petals', in crowded clusters. Flowers all year.

General Biosecurity Duty all NSW.

PlantNET description:  http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Ageratina~adenophora (accessed 2 January, 2021)