• Skip to main content

Central QLD Coast Landcare Network

  • Local Plants Database
  • Local Wildlife Database

SEARCH PLANT AND ANIMAL DATABASES

BILLYGOAT WEED (WEED)

Ageratum conyzoides, Fam. Asteraceae


Erect or semi-prostrate annual or short-lived perennial herbs, 0.3-1m. Stems and leaves softly hairy with a characteristic odour when crushed.

Form or habit: Herb
Latex: Asteraceae
Leaf: Simple Alternate
Opposite at base, later alternate, triangular shaped with heart-shaped to square base, regular rounded teeth along margin.
Flower conspicuous: Conspicuous
Flower colour: pale mauve to almost white
Flower description: Small fluffy heads, borne in terminal clusters.
Fruit conspicuous: Conspicuous
Fruit colour: Brown
Fruit: Dry
Fruit description: ‘Seeds’ black, about 2mm long, tipped by ring of chaff-like scales.
Habitat:
Distribution
Food source for:
Toxicity: Toxic or irritant to domestic pets
Origin: Asia
Weed: Yes
Weed status: Environmental/garden escapee
Notes: Spread by: Wind, water. Invades/threats: Weeds of disturbed areas. Cause harvesting difficulties in cane crops. A. conyzoides is the more common species in this region then A. houstonianum which has seldom been recorded. Environmental weed.
Information sources:

Website by Kapow Interactive