Flooded Gums or Sydney Blue Gums?

Eric Frei

I narrowed it down, take a look and let me know your thoughts, E grandis or E saligna?

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jmcg.insight.gardens

I think Eucalyptus grandis,

why?

the capsules are sessile or shortly pedunculate, the valves are incurved and thick compared to Eucalyptus saligna which has thin valves that are recurved or and peduncles are compressed or 2 angled , 8-12mm long.

checked with Flora of the Sydney Region Beadle Evans Carolin (Reed, p 332)

Why links.......and PDFs............because I have'nt got my head around resizing JPEG's........... .........yet.

Attached Files

Eucalyptus grandis versus Eucalyptus saligna.pdf (260.7 KB, 49 views)

Eric Frei

Anyone else going to have a go?

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ABSOLUTELEE

The capsules would suggest E grandis (broad and incurved valves), E saligna having thinner erect or outcurved valves.

Bernard Keays

I agree with the above.

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Bernie

glennak

found this:
Because of the wide international interest and the problems of hybridization and identification of the two species, a comparison of E. saligna and E. grandis populations representative of the entire range of each species was made in Australia (4). Distinct differences were found in seedling and mature-tree morphology and allozyme frequencies between core populations of the two, but intermediate types were found in some remote locations. Core mature saligna eucalyptus had smaller seed, upright valves (4 per fruit), and non-glaucous fruit and branchlets as compared with E. grandis, which had larger seed, incurved valves in 5's, glaucous fruit and branchlets. Saligna eucalyptus seedlings had lignotubers and were glaucous; not so, E. grandis. Saligna eucalyptus seedlings also had smaller cotyledons and narrower, longer leaves. The allozyme patterns found for native populations in Australia showed species differences and were later compared to patterns found for populations collected in the Republic of South Africa, which were thought to be hybridized (5). All the South African trees sampled fell within the allozyme patterns found in Australia for E. grandis, even though several were morphologically suspect.

Do they have 4 valves Ekka? The one on the right may have 5. Just checing in Euclid. Looks more like grandis but it should have 5 valves. In Euclid it says under grandis that saligna consistently has 4 valves but under saligna it says saligna has 3 or 4 valves. Need bud photos are they glaucous? if so not saligna. saligna also has lignotubers.

In addition to the Eucalyptus grandis/E. saligna complex, E. saligna crosses with E. robusta, bangalay eucalyptus (E. botryoides), and probably with forest redgum eucalyptus (E. tereticornis) (12,28). In the southern part of its natural range, a region of introgression of E. saligna with E. botryoides exists (23).

I once keyed a Euc out 3 times and got 3 different species but none were quite right. Then read in Euclid that there is an area where the 3 were indistingishable. That's the trouble with Eucs there is a continuum not straight species

jmcg.insight.gardens

maybe this will help,..............

attempting my first upload of a picture so bear with me.

regards Julie

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jmcg.insight.gardens

why did it come out so small? And why did it not imbed itself?

I don't understand.............

Anyway Eucalyptus are so hard to Key, there is so much variation.

I have one out the front here at home that just about drove me bananas, as it has both 4 valved capsules and five valved capsules on the same umbel. Must be a hybrid.

Julie

Jeff Darby

Julie, how I embedded your picture was

1: too right click on the picture.

2: copy picture address.

3: click on the icon of the mountains and moon.

4: When the address bar appears.

5: The http will be highlighted.

6: Press backspace to remove this.

7: Then paste in your saved picture addy.

8: Now preview your post and bingo! you done it.

9: Once your happy with your post, Press save post

Hope this helps with your confusions..

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Member: Australian Tree Association

Join the Australian Tree Association...Have your voice heard !

Arboriculture, A life long study for some, a passing phase for others

© Jeffrey J Darby 2011

jmcg.insight.gardens

Thanks JayD,............

that's kind of you.

............................

I've copyed and pasted it to the desktop, and will follow the instructions next time. But what if it was from a scanned image?

I feel a bit silly..........you wouldn't think I can do AutoCAD.

And no comment Ekka! I know what your thinking........hehe.

Eric Frei

I am thinking of how much time I waste .....

<yawn> it's been there since 2007 and is in everyones registration email and PM.

How to post| add a picture or file| embed picture

Also the little picture is called a thumbnail as a backup for those who did not embed so others see it there and click on it. The forum does have auto embed feature however then there'll be doubles as existing embeds will be also shown in addition to the auto embedding at the end of the post.

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Eric Frei

For the record I ID'd these as grandis upon sighting and reported on them as such, however was looking for confirmation. I do not see many saligna's up here and occasionally I wonder "what if".

I do appreciate the discussion, it cements what to look out for in future.

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jmcg.insight.gardens

I knew it, I knew you would think that, ..................................

Eric Frei

Another tree which can be confused with E grandis is E pilularis (blackbutt).


Details for E pilularis is here.

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