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WattleAcacia decurrens

Green Wattle at Tuggeranong Hill

5 images

Acacia decurrens at Tuggeranong Hill - 8 Feb 2019
Acacia decurrens at Tuggeranong Hill - 8 Feb 2019
Acacia decurrens at Tuggeranong Hill - 8 Feb 2019
Acacia decurrens at Tuggeranong Hill - 8 Feb 2019
Acacia decurrens at Tuggeranong Hill - 8 Feb 2019

Identification history

Wattle Acacia decurrens 24 Jun 2019 MichaelMulvaney
Wattle Acacia mearnsii 8 Feb 2019 MichaelMulvaney
Wattle Acacia mearnsii 7 Feb 2019 michaelb
Wattle Acacia decurrens 7 Feb 2019 Owen

11 comments

   7 Feb 2019
The leaflets are far enough apart to say it could be decurrens. However, the diagnostic is the decurrent leaves (bases continuing down the stems) creating winged ridges on the stems.
michaelb wrote:
   7 Feb 2019
Acacia mearnsii is quite common in Tugg. Hill Res.
michaelb wrote:
   7 Feb 2019
The Acacia mearnsii on Tugg. Hill flower in November and have a rich fragrance. Sometimes I catch the fragrance on the wind at my place which is 500 metres away !
Owen wrote:
   7 Feb 2019
Many thanks Betty/Michael. I should have mentioned the pinnules are approx 10mm plus in length. All A. mearnsii pinnules I've seen have been much smaller. Any advice?
   7 Feb 2019
You are right. The maximum length is 4 mm. I will have a think about it tomorrow.
Owen wrote:
   8 Feb 2019
Thank you for your help Betty. Will return to site this afternoon and obtain exact measurements, photo any old seed pods (if still around) etc. and get back to you.
   8 Feb 2019
You might like to look at https://apps.lucidcentral.org/plants_se_nsw/
before you go, so you know what to look for. This is an earlier (computer) version of the app I am beta testing.
Owen wrote:
   8 Feb 2019
Michael M: thanks - but I would like to query your confirmation as Acacia mearnsii for this one.
From various sources including http://worldwidewattle.com/imagegallery/image.php?p=0&l=m&id=17958&o=1 :
*Acacia mearnsii: Leaflets (pinnules) 1-3.5mm long, broadly rounded, jugary gland at base of all pinnae, interjugary glands often between some or all pinnae. Under leaf very hairy.
*My submission as per images: Leaflets (pinnules) - newer growth: pinnules 8-11mm long, mature growth: pinnules 11-14mm long. Jugary glands at base of all pinnae only, no interjugary glands. Under leaf hairless.
I am not able to submit a comparison image which would show the vast difference in sizes between the local A. mearnsii and the submission as I do not hold a collectors permit. This is the only specimen I have as yet come across in this area.
Betty: Thank you for the link - I was out there early this morning.
Appreciate any advice.
   8 Feb 2019
The clincher that I am looking for in Acacia decurrens are the ridges that occur along the stems shown very well in one of your easier sightings. https://canberra.naturemapr.org/Community/Sightings/Details/4192144. That said wattles do hybridise and and recognising hybrids can be tricky and I now think this is probably what we have in this case - I can add you to the CNM collecting permit if you email me your address to michael.mulvaney@act.gov.au
Owen wrote:
   8 Feb 2019
Thanks for the advice Michael.
   24 Jun 2019
Owen dropped off a couple of specimens from this plant to the ANBG and received the following advice from Dave Albrecht concerning same:

Hello Owen
Thanks for submitting the specimen and photograph of the plant of Acacia decurrens (Green Wattle). We’ll retain the specimen for the herbarium collection. This species is distinctive in having prominently winged branchlets decurrent with the petiole bases, jugary glands but no interjugary glands, and green usually hairless pinnules.
All the best,
Dave
David Albrecht
Plant Identification and Liaison Officer | Australian National Herbarium
Centre for Australian National Biodiversity Research
National Research Collections Australia
CSIRO

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Nearby Sightings

Page 1 of 1 pages - image sightings only 5 0 5

Jalmenus icilius (Amethyst Hairstreak) at Tuggeranong Hill - 9 Mar 2019 Goniaea australasiae (Gumleaf grasshopper) at Tuggeranong Hill - 7 Feb 2019 Leucopogon attenuatus (Small leaved beard heath) at Tuggeranong Hill - 13 Sep 2014 Calytrix tetragona (Common fringe-myrtle) at Tuggeranong Hill - 13 Sep 2014 Stackhousia monogyna (Creamy Candles) at Tuggeranong Hill - 13 Sep 2014
Jalmenus icilius (Amethyst Hairstreak) at Tuggeranong Hill - 9 Mar 2019
Goniaea australasiae (Gumleaf grasshopper) at Tuggeranong Hill - 7 Feb 2019
Leucopogon attenuatus (Small leaved beard heath) at Tuggeranong Hill - 13 Sep 2014
Calytrix tetragona (Common fringe-myrtle) at Tuggeranong Hill - 13 Sep 2014
Stackhousia monogyna (Creamy Candles) at Tuggeranong Hill - 13 Sep 2014

Page 1 

Location

Location information

Species information

  • Not Sensitive
  • Non-local Native
  • Medium Weed or Pest

Sighting information

  • 1 Abundance
  • 8 Feb 2019 7:10 AM Recorded on
  • Owen Recorded by
  • Website Reported via
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