Dean's photos are enough to me, and confirm George's guess: Ferdinand Bauer's Tree. If there was some doubt because of fruit form, pedicel length is clear: E. polyanthemos ssp. vestita does not match Benoit's photo.
Three comments and thoughts this all has sprouted, in case it is useful to any of you anytime:
1) Eucalyptus Botany is, to some extent, like Archaeology. But in this case, the fossils are alive: they are genes contained in trees.
Result of combination and recombination in each generation with each cross-pollination. In some areas those recombinations and a particular condition (can it be soil, a microclimate, or any other factor) favour some slightly different genes to survive and be passed on in higher frequencies. So, trees start to look slightly different (but too slowly for us to notice how it happens!).
Some non smooth barked ones are more frequent in some places, maybe because the more smooth barked ancestors could not bear much seed due to more frequent fires (thick bark = evolutive advantage for fire protection). Example (hypothetical, but helps understand): E. polyanthemos ssp. vestita in VIC, E. polyanthemos ssp. polyanthemos in NSW.
Some waxy dull leaved ones are more frequent in some places, maybe because glossy green leaved ones heat more in their darker canopies and transpire more water, so they cannot take frequent droughts so well and dry out before seeding (light coloured leaves = evolutive advantage to decrease water loss). Example (hypothetical, but helps understand): E. polyanthemos on well drained areas in Central VIC hills, E. baueriana on well watered areas in Coastal VIC rivulets.
Hence, if we were birds, we could be jumping from tree to tree, from nearly Adelaide to nearly Sydney landing on closely related tree "races" that are slowly (for us) evolving into different forms ("different taxa") while adapting to the slow (for us) changes driven by the cycles of nature. Hence, for this case, E. fasciculosa, E. polyanthemos ssp. polyanthemos, E. polyanthemos ssp. vestita, E. polyanthemos ssp. longior, E. polyanthemos ssp. marginalis, E. baueriana, and who knows how many other yet undiscovered?
Each group of closely related eucalypt species is like a civilization to discover by archaeologists. And the more distant, the older the common civilization was once. That is how specialists try to work out how and when the taxonomic tree of eucalypts spread its branches. We were not there, it happened along millenia following the paths of nature and evolution. We cannot but "follow the tree" from the smallest branchlets ("the species and all the variation in them we see today") to the main trunks ("what was once"). From Australia to Gondwanaland, or maybe beyond, to the first myrtle.
2) Knowledge on Eucalyptus seed provenances and origins is very important (nothing too new eh?). Why? Because, besides many many other things helpful to growers, it can be of help to Indiana Jones! The alive fossil may be contained in a growing tree in France, but the genes came, encapsulated as seed, from somewhere along the path of that jumping bird going from Adelaide to Sydney (or Sydney to Adelaide). If data on the geographic area where seed originating the tree at St Rafael was once collected had been preserved in the long path from seed collector to nurseryman, from nurseryman to gardener or tree planted, and from there were available somehow to us observers... then some Indiana could know where to look at to see if the trees down under resemble the one at St Rafael, and after carefully observing the hints on terrain, ponder why.
Of course, preserving that information is very difficult, and you cannot expect it to happen but in rare or very rare occasions. Rarely the collector, and nurseryman, and gardener or tree planter, and observer... and archaeologist... is the same person. More often, but still rarely, you can still gather or infer some of the information from observation and detective work, but that is more prone to error.
3) Tree labels are very important, but observation of the trees will always be more important than observation of the labels (or records, or lists, or datafiles). The tree at St. Rafael could well have been planted knowingly as E. baueriana, or as E. polyanthemos by nurseryman or tree planter. or maybe not. We cannot know. Maybe the seed was collected knowingly from E. baueriana or E. polyanthemos, or any of the related taxa. Or maybe not. We cannot know. What we know is that E. polyanthemos, one of the Silver Dollars, has become popular among eucalypt growers around the world for a long time, and it still is. And that makes more birds jump from tree to tree. And that also makes more trees grow in distant places, starting new founding populations, to start the same process of gene recombination "aided by bees" that may or may not, one day, yield a worthy cultivar... or a new mix... to amuse the observing Indiana Jones of future times, when we all are already gone, but not forgotten.
This is the magic of Eucalyptus, and the magic and legacy of their botanists since the days of Sir Joseph Banks to the days of Dean Nicolle, and to the future days of future eucalypt botanists. The magic of biodiversity, of plants and of evolution. The magic of nature, the alive beings and those who have the privilege to observe them.
Magic that is shared. It is there, in the books of old and new. And in the books of future. May they always exist. Printed on Eucalyptus made paper.
If after all this, you can better see the monument to eucalypt botany that is growing at Currency Creek and its importance, then I am satisfied. And I am quite sure E. brookeriana will always grow happily there.
PS: Of course, any book by the mentioned authors is highly recommended to any eucalypt fan, no matter the expertise!
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