Fungal gall of Exocarpus sp.

Tuggeranong DC, ACT

Fungal gall of Exocarpus sp. at Tuggeranong DC, ACT - 11 Oct 2017
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Identification history

Fungal gall of Exocarpus sp. 21 Feb 2019 MichaelMulvaney
Uromycladium sp. 8 Feb 2019 MichaelMulvaney
Unidentified 11 Oct 2017 Mike

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User's notes

Gall on Exocarpos.

8 comments

   8 Feb 2019
See page 159 of Farrow (2016)
Mike wrote:
   8 Feb 2019
Thanks Michael. Page 158 also solves one of my other ID problems.
KenT wrote:
   8 Feb 2019
Unfortunately as it is currently known, the genus Uromycladium is restricted in its host range to four genera within the Fabaceae (see Doungsa-ard, C.; McTaggart, A.R.; Geering, A.D.W.; Shivas, R.G. (2018) Diversity of gall-forming rusts (Uromycladium, Pucciniales) on Acacia in Australia, Persoonia Volume 40, June 2018, pp. 221-238). One or more fungi may be involved but not Uromycladium until someone can demonstrate otherwise.
julielindner wrote:
   9 Feb 2019
It looks to me to be a fasciation a condition that causes distortion of the growing tip. This can be caused by a hormonal imbalance, genetic mutation, bacterial, fungal or viral infection, insect attack or physical injury.
Mike wrote:
   9 Feb 2019
I added this sighting because of discussion on Other Tree Exocarpos cupressiformis (Cherry Ballart) on 7 Oct 2017 about galls on Exocarpos cupressiformis.
KenT wrote:
   9 Feb 2019
Some of the information presented concerning Other Tree Exocarpos cupressiformis (Cherry Ballart) on 7 Oct 2017 is now out of date. Uromycladium tepperianum has been split into a further 16 species, Uromycladium tepperianum in the strict sense is currently only known from Acacia cupularis, A. ligulata, A. rostellifera, A. sclerosperma and A. xanthina and occurs in South Australia and Western Australia. Uromycladium notabile was found to be based on two separate species so it has ceased to be recognised. The paper referenced by Scurfield 1965 appears not to have been followed up by anyone since that I can find - it might make a decent honours thesis to repeat the work and apply modern molecular techniques to the problem.
RogerF wrote:
   7 Feb 2024
I have only just read these comments 5 years later and have accordingly looked up the 2018 paper that was not published at the time of writing my book
The fungus gall on Acacia dealbata is T Murphyi according to this list of hosts.
KenT wrote:
   7 Feb 2024
There are two genera of gall forming fungi on Acacia dealbata representative species being Uromycladium murphyi and Endoraecium carnegiei. Aside from using molecular diagnostic methods they can be distinguished by examination of the spores under a compound microscope (400x is adequate). For Endoraecium see: A.R. McTaggart, C. Doungsa-ard, A.D.W. Geering, M.C. Aime, R.G. Shivas (2015) A co-evolutionary relationship exists between Endoraecium (Pucciniales) and its Acacia hosts in Australia. Persoonia 35: 50–62.

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Location information

Sighting information

  • 16 - 100 Abundance
  • 11 Oct 2017 12:01 PM Recorded on
  • Mike Recorded by

Species information

  • Fungal gall of Exocarpus sp. Scientific name
  • Common name
  • Not Sensitive
  • Local native
  • Non-Invasive
  • 752m Recorded at altitude
  • Machine learning
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