Eucalyptus globulus subsp. bicostata

Southern Blue Gum, Eurabbie at Pine Island to Point Hut

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Identification history

Eucalyptus globulus subsp. bicostata	31 Aug 2018	MichaelMulvaney
Eucalyptus globulus subsp. bicostata	27 Aug 2018	MichaelBedingfield
Eucalyptus saligna	26 Aug 2018	MichaelBedingfield
Unidentified	26 Aug 2018	MichaelBedingfield

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User's notes

Apparently planted and multiplying; also been cut down by rangers and regrown; on the east side of the Murrumbidgee River, north of Pine Island.

13 comments

MichaelBedingfield wrote:

26 Aug 2018

If my memory is correct Rainer R told me that these were Sydney Blue Gums. The name which ANBG gives is Eucalyptus saligna, and it would be a new one for our species list.

Mike wrote:

27 Aug 2018

Maybe another Blue Gum Eucalyptus globulus subsp. bicostata. This is being removed from some areas as it is a fire hazard and an invasive non-local species.

natureguy wrote:

27 Aug 2018

Eucalyptus globulus is the Tasmanian Blue Gum not the Sydney Blue Gum.

Mike wrote:

27 Aug 2018

That's why I said 'maybe another Blue Gum'. We will have to wait for Rainer to say whether MIchaelb's recollection is correct. I think there's more than one Sydney Blue Gum too.

natureguy wrote:

27 Aug 2018

I just checked and Eucalyptus saligna appears to be the only Sydney Blue Gum.

Mike wrote:

27 Aug 2018

I am no expert so I got my info from Wikipedia - - 'sometimes regarded as blue gums … Sydney blue gum (Eucalyptus notabilis)', though the entry for that doesn't mention blue gum.
I think the third photo of this sighting shows juvenile foliage like E. globulus. 'opposite pairs on square stems' but I will wait for the experts.

MichaelBedingfield wrote:

28 Aug 2018

Maybe I was told Blue Gum. Mike's suggestion seems more accurate. So I've changed my suggestion to Eucalyptus globulus subsp. bicostata.

MichaelMulvaney wrote:

31 Aug 2018

Eucalyptus globules subsp bicostata is a mainland (largely Victorian species) that grows on the great Dividing Range up to north of Armidale. It is called Sydney Blue Gum by old Nurseyman like Rainer and is one of the most common eucalyptus plantings in the Canberra region.

rainer wrote:

31 Aug 2018

There are at least three “types” of blue gums that have been planted in our region. According to PlantNet, one, formerly known as E. globulus is now E. pseudoglobulus (http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Eucalyptus~pseudoglobulus), in our region apparently only natural in the South Coast Botanical Region, and E. bicostata (http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Eucalyptus~bicostata) from the South-western Slopes region, where it meets the Southern Tablelands. The link to AVH on both species’ pages in PlantNet takes you to the same page, to a taxon called E. globulus subsp. pseudoglobulus. Another formerly recognised species was E. st johnii. This taxon, from Victoria, is now also apparently regarded as a subspecies of E. globulus. So, what were perhaps three taxa are really only one, E. globulus subsp. pseudoglobulus. Sydney Blue Gum, E. saligna, is quite different. It also occurs in the coastal ranges east of Canberra. The Tasmanian Blue Gum is E. globulus subsp. globulus. Here’s a factsheet on the weediness of that taxon, and I’d say it would probably refer to all globulus subspecies. https://keyserver.lucidcentral.org/weeds/data/media/Html/eucalyptus_globulus_subsp._globulus.htm

MichaelBedingfield wrote:

31 Aug 2018

Thanks Michael M. I'm glad my memory is still functioning !

BettyDonWood wrote:

31 Aug 2018

Plantnet is out of step with the approved names. The approved names are subspecies of Eucalyptus globulus - Eucalytus globulus subsp. bicostata (Eucalyptis bicostata and Eucalyptus St Johnii) and Eucalyptus globulus subsp. pseudoglobulus (Eucalyptus pseudoglobulus).
Euclid4 fact sheets: bicostata - http://keyserver.lucidcentral.org:8080/euclid/data/02050e02-0108-490e-8900-0e0601070d00/media/Html/Eucalyptus_globulus_subsp._bicostata.htm
pseudoglobulus - http://keyserver.lucidcentral.org:8080/euclid/data/02050e02-0108-490e-8900-0e0601070d00/media/Html/Eucalyptus_globulus_subsp._pseudoglobulus.htm
Subsp. globulus - http://keyserver.lucidcentral.org:8080/euclid/data/02050e02-0108-490e-8900-0e0601070d00/media/Html/Eucalyptus_globulus_subsp._globulus.htm

rainer wrote:

31 Aug 2018

Not sure how up-to-date AVH is in comparison to the Euclid key. See my note about AVH.

rainer wrote:

31 Aug 2018

By the way, I didn’t mention Sydney Blue Gum in relation to this sighting. I merely said it was one of the blue gums, but recognise Sydney Blue Gum as being quite different!

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Location information

Coordinates 149.054722 -35.426293
Altitude 583.5m
Maps Pine Island to Point Hut
Places Greenway, ACT

Sighting information

4 - 15 Abundance
20 Aug 2018 05:22 PM Recorded on
MichaelBedingfield Recorded by
Collections
Eucalypt health surveillance in Canberra Plants Gum Trees

Additional information

Greater than 5 metres Plant height

Species information

Eucalyptus globulus subsp. bicostata Scientific name
Southern Blue Gum, Eurabbie Common name
Not Sensitive
Non-local native
Minor weed or pest
Up to 1017.43m Recorded at altitude
229 images trained Machine learning
In flower
External link More information
Synonyms
Eucalyptus bicostata

Record quality

Images or audio
More than one media file
Verified by an expert moderator
Nearby sighting(s) of same species
GPS evidence of location
Description
Additional attributes