*Conyza sumatrensis

Family: Asteraceae

Tall Fleabane

Robust, erect annual herb to 1 m high. Longevity less than one year.

Flowers: At any time.

Fruit: Achene, ovoid with pappus of minutely barbed bristles, 3 mm long, maturing at any time of the year.

Seed: Wind dispersed.

Gallery images: seed, seedling, rootstock, resprout


  • Native of North America.
  • Weed of grassland and pastures in full sun to light shade.
  • Occasional, minor weed, in woodland and grassland at the Australian Botanic Garden.
  • Killed by fire.
  • Flowers reported to be eaten by Crimson Rosella Platycercus elegans.

Asterisk * indicates exotic species naturalised at the Australian Botanic Garden.

Ecology of Cumberland Plain Woodland

Conyza sumatrensis flower

Conyza sumatrensis fruit