Inconclusive sighting
Brittle Gum at Stromlo, ACT
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Comments from moderator
We will save the record, but the tree is too hard to ID. See comments.| Insufficient or inconclusive evidence | MichaelBedingfield | 7 Mar 2022 | |
| Eucalyptus rossii | Tapirlord | 4 Mar 2022 | |
| Eucalyptus mannifera | MichaelMulvaney | 21 Feb 2022 | |
| Eucalyptus mannifera | Tapirlord | 21 Feb 2022 | |
| Unverified | BarrieR | 21 Feb 2022 |
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10 comments
21 Feb 2022
With gum trees it's beneficial for IDing to get as many photos of different parts of the plant as possible, especially leaves, buds and fruit.
27 Feb 2022
Just a question here, not being facetious, but how do we know this isn't Eucalyptus rossii? I can even see scribbles on the trunk in that photo and there are no other identifying features provided. Just curious as to what I'm missing.
27 Feb 2022
From my perspective, this ID is likely but not 100% certain, becuase as you say, we really need images of foliage and fruit to make a definitive ID (depending on spcies of couse). I went with mannifera over rossii as the new bark in the foreground of the photo is a creamy white colour (Yellow in Rossii), though it will become darker with age in both species. Otherwise it could in theory be either (the scribbles can occur on both species I believe, if anything the faint scribble suggest mannifera, Rossii tends to have a greater denisty). I would encourage anyone who is trying to differentiate Rossii & mannifera in the field to use the "rub test" as the bark of mannifera should give off a fine powder (doesn't occur in Rossii). The compressed bark at the base of the limbs "wrinkly armpits" is another thing to look for (diagnostic of Rossii).
27 Feb 2022
Thanks for the extra info Tapirlord, next time I'm in Bluetts I might hunt this tree down and see what I find.
4 Mar 2022
Hi guys. today I went and had another look at this tree, and as a result have just posted some new photos which may help in the ID. I couldn't see any powder on the bark after rubbing the bark in several places, there was only one under arm wrinkles, not especially pronounced, and, low down, 2-3 minor squiggles. Hope all this helps
Barrie
Barrie
4 Mar 2022
Thanks Barrie, have had a look at the new sighting (you can add those extra photos to this sighting if you like), and I'd be inclined to say it is a Scribbly Gum, as my field guide says that the Brittle Gum only has a maximum of 7 buds per umbel. The fruit also fit the description of having a flattened, reddish top.
6 Mar 2022
Probably best to delete one but I'll leave that to Michael, Duplicate record probably doesn't really hurt given the location. @MatthewFrawley
Location information
Sighting information
- 4 - 15 Abundance
- 15 Feb 2022 10:13 AM Recorded on
- BarrieR Recorded by
Collections
Species information
- Eucalyptus mannifera Scientific name
- Brittle Gum Common name
- Not Sensitive
- Local native
- Non-invasive or negligible
- Up to 932.7m Recorded at altitude
- External link More information
Seasonal activity
-
In flower
JFMAMJJASOND
Record quality
Quality score
2 / 7
- Images or audio
- Verified by an expert moderator
- More than one media file
- Nearby sighting(s) of same species
- GPS evidence of location
- Description
- Additional attributes