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Announcements

Sensitive data handling improvements

5 Feb 2025

Hi All,We've just rolled out some important improvements to NatureMapr's sensitive data handling framework in consultation with the NSW Government Saving Our Species team.For Highly Sensitive records,...

Near future enhancements

Platform update continued 30 JAN 2025

Major upgrade under way. Some known issues.

DO NOT MISS THIS!

Discussion

marcycad wrote:

6 Feb 2025

This is a very interesting sighting. The leaves appear too lax (arching over) to be X. resinosa, which typically exhibits tough leaves that radiate from the crown in an upright tuft relatively straight with little flexion. X. resinosa also usually produces single caudex, this has multiple crowns, more like that of X. concava, however the leaves seen very narrow for this species. It looks more like X. fulva, however this species does not occur this far south in NSW. This may be a narrow-leaved form of X. concava or perhaps an unreported hybrid between X. concava x australis.

Hybridisation in Xanthorrhoea does indeed occur, and is likely to be widespread where different species converge, however it does not appear to occur as extensively as is believed, this is because it can only transpire under very particular environmental conditions, such as where two species have overlapping geographical distributions alongside a coincidental flowering period in conjunction with where they meet across a transitional zone comprised of a gradual environmental gradient. i.e. areas bounded by two ecosystems or an ecocline, for instance a region between clay and sandy soils or wet and dry habitats. Fundamentally these are always environments comprised of conditions not preferred by either parent.
Morphological intergradation can also occur when two or perhaps more species are found within close proximity of each other, and populations displaying intermediate characteristics between species may be interpreted as hybridisation but may be the result of lateral gene transfer, which is the transfer of genetic material between two organisms. Molecular and genetical analysis could prove the best means with which to resolve the taxonomic problems associated with this genus.

Xanthorrhoea sp.

AaronClausen wrote:

6 Feb 2025

Yep, making a suggestion over the top of an existing verification is in essence endorsing and supporting the moderator's ID. From a platform perspective it is perfectly fine to do and doesn't take away from the quality of the record or the final state of the record that is sent to government data partners etc. The record remains in a verified state as per the most recent verification, which is Darcy's. I see this as Marcycad having given Darcy a pat on the back or a nod of "yep I concur!". Well done and thanks both of you.

Xanthorrhoea glauca subsp. angustifolia

marcycad wrote:

6 Feb 2025

Hi Darcy, I appreciate your message, but I respectfully have to disagree. I believe there is a need to reinforce an identification to a sighting as a means of strengthening the suggested species ID. You will undoubtedly find many examples on this platform, particularly with Xanthorrhoea, a genus of plants that can be extremely difficult to differentiate one species from another, where different users of this platform have applied a number of species to individual Xanthorrhoea sightings. 'Re-suggestion' can only be a positive thing in recognition of an individuals identification ability, would you not agree?

Xanthorrhoea glauca subsp. angustifolia

Darcy wrote:

6 Feb 2025

Fair enough, but you don't need to re-suggest the ID its already got, you can just leave a comment :)

Xanthorrhoea glauca subsp. angustifolia

marcycad wrote:

5 Feb 2025

I was just adding some additional information as verification for those unaware.

Xanthorrhoea glauca subsp. angustifolia