NSW Support NatureMapr in your region (Are you from Local Government?)
Home Plants Daisies

Ageratum houstonianum

Blue Billy Goat Weed at Nambucca Heads, NSW

Ageratum houstonianum at Nambucca Heads, NSW - 28 May 2022
Ageratum houstonianum at Nambucca Heads, NSW - 28 May 2022
Ageratum houstonianum at Nambucca Heads, NSW - 28 May 2022
Ageratum houstonianum at Nambucca Heads, NSW - 28 May 2022
Request use of media

Identification history

Ageratum houstonianum 18 Jun 2022 Tapirlord
Ageratum sp. 30 May 2022 Topknot
Unidentified 29 May 2022 trevorpreston

Identify this sighting


Please Login or Register to identify this sighting.

4 comments

Tapirlord wrote:
   31 May 2022
Ageratina adenophora (Crofton weed)
   1 Jun 2022
This weed was very common on North Coast roadsides.
Thanks for your ID work on North Coast Nature Map, hopefully more moderators will get on board for this area soon.
Topknot wrote:
   9 Jun 2022
I do reckon it's Ageratum (probably houstonianum?) - Ageratina has white flowers, whereas the flowers in the photo look mauve/blue to me
Tapirlord wrote:
   10 Jun 2022
Having had another good look I think you are right, but for me it is leaves that are the decider, the flower colour can be variable amongst garden cultivars. Ageratum has densely hairy leaves and stems, will in Ageratina the leaves are almost glabrous.

Please Login or Register to comment.

Location information

Species information

  • Not Sensitive
  • Exotic
  • Minor Weed or Pest

Sighting information

  • 16 - 100 Abundance
  • 28 May 2022 02:53 PM Recorded on
  • trevorpreston Recorded by

Additional information

  • 30cm to 1 metre Plant height
  • True In flower

Record quality

  • Images or audio
  • More than one media file
  • Confirmed by an expert moderator
  • Nearby sighting(s) of same species
  • GPS evidence of location
  • Description
  • Additional attributes
290 sightings of 120 species in 26 locations from 54 members
Proudly Australian made, owned and hosted CCA 3.0 | privacy