Acacia mearnsii

Black Wattle at Belconnen, ACT

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Identification history

Acacia mearnsii	19 Aug 2023	natureguy
Acacia decurrens	19 Aug 2023	CarbonAI
Acacia mearnsii	19 Aug 2023	lbradley

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7 comments

lbradley wrote:

19 Aug 2023

Hey Luke - would you check this one again? I'm thinking that CarbonAI might be right - it might be A. decurrens. Mine has orbicular jugary glands at all pairs of pinna which is the description at:
https://profiles.ala.org.au/opus/foa/profile/Acacia%20decurrens

Acacia mearnsii is usually with 1 or 2 often confluent interjugary glands between some or all pairs of pinnae

My 4th pic clearly shows glands as for A. decurrens

What do you think?

Tapirlord wrote:

19 Aug 2023

Luke is correct, A.mearnsii. We can say that pretty confidently based upon phyllode shape and structure. A.mearnsii usually has interjugary glands, so I'm not quite sure what you are trying to say.

lbradley wrote:

19 Aug 2023

There are single glands between each pair of pinnae at regular intervals for mine which is consistent with A. decurrens. A. mearnsii has 1 or 2 glands between each pair of pinnae and irregularly spaced.

lbradley wrote:

19 Aug 2023

Compare glands on photo at
Acacia mearnsii (Black Wattle)
With the glands on my 4th photo (you will have to enlarge my photo a bit)

lbradley wrote:

19 Aug 2023

Forget it. I need it for my species list - I don’t have A. mearnsii and I already have A. decurrens. Which is also an indicator that it might be A. decurrens. There are other A. decurrens in the area not no other sightings of A. mearnsii in that area. The only recorded sighting of A. mearnsii in AB is near the Cook entrance to AB - no where near.

natureguy wrote:

19 Aug 2023

To me this is a pretty typical A. mearnsii as discussed above by Ciaran - it is a very common and typical species found throughout most patches of woodland locally so I'm almost surprised by what you're implying that it hasn't been recorded more widely in Aranda Bushland.

Tapirlord wrote:

19 Aug 2023

A.mearnsii tends to be a grassy woodland species and Aranda is mostly heavily forested woodland (being on BM sandstone). So it's probably naturally uncommon in the area relative to other species.

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