Arisaema triphyllum. Detta
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Granska bestämningar av Arisaema triphyllum 50310
Taxonomic Split 122429
(Bekräftad den 14-02-2023)
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Here's the current range map for the species. For those viewing it, you may want to change A. acuminatum to "ident_taxon_id" to better view the extent of its range. https://www.inaturalist.org/observations/compare?s=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
If A. triphyllum isn't restricted to Florida (e.g. https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:1107169-2)
its confusing to make a split that treats it as such. My preference would be to make an atlas that reflects the distribution of A. triphyllum even if it results in more IDs getting rolled back to the complex level to avoid confusing people
I think you mean A. acuminatum? The issue is that I don't know the full extent of its range since these species are so complicated to differentiate and have almost no literature about them. However, I do know now that every observation of a flowering individual in Florida appears to be A. acuminatum, so I thought elevating A. triphyllum IDs to complex would be helpful using a temporary Florida-limited atlas for A. acuminatum. This seems to be the neatest way to push our taxonomy in the right direction.
A. acuminatum definitely occurs in Georgia, and seems to range into Alabama, Mississippi, and Louisiana.
POWO has A. acuminatum listed for Texas, too, although it may be erroneous.
Sorry I did mean A. acuminatum.
I defer to you as I don't know what the change from A. triphyllum (sensu lato) was - ie how many species was it split into, what are there distributions etc.
I probably would have added the new taxa (A. acuminatum etc.)
and then split A. triphyllum -> A. triphyllum, A. acuminatum, etc.
with atlases for each, knowing that many thousands of IDs would be rolled back to the common ancestor.
The problem is that there aren't any known definite ranges for the split species. If this split doesn't have any unintended consequences, I'll go ahead with it and continue refining observations in the A. triphyllum complex. I'd prefer to reserve the large-impact splits for when "Arisaema species 2" is separated, since the alternative seems to be rolling back A. triphyllum observations to complex every few years when new cryptic elements are described.
Hi @rynxs , I am trying to follow when and how this split is being made. What/whose is the recent treatment that suggests this? Thanks! Ed
@edlickey the split has already been committed, and it's a bit complicated, but I'll sum it up as brief as possible.
Plants of the World Online, iNat's source for vascular plant taxonomy, fairly recently accepted the Weakley (2022) treatment of the genus Arisaema in the Flora of the Southeastern United States. That treatment validates five members of the Arisaema triphyllum complex as species-level entities (A. acuminatum, A. pusillum, A. quinatum, A. stewardsonii, and A. triphyllum sensu stricto). There is great uncertainty about the geographic distribution of these entities, but in manually reviewing every observation in the genus from Florida, I can say with certainty Arisaema quinatum and Arisaema acuminatum are the only species so far demonstrated to be naturally occurring in the state, of those in the A. triphyllum complex. Therefore, I drafted a split which would elevate all IDs of Arisaema triphyllum sensu lato for observations in the state of Florida to the level of complex, freeing the pathway for observations for the other elements in the complex to become Research Grade for their appropriate taxon in our current treatment.
Thanks! I'll check it out.
According to this (ten-year old) article, there are three taxa in FL: https://www.phytologia.org/uploads/2/3/4/2/23422706/942151-158_ward_arisaema_flora_31.pdf
Yeah, I finally downloaded Weakley's most recent edition. I had forgotten about that paper by Ward. Thanks. The triphyllum complex has always peaked my interest and I have often wondered how strong those species boundaries really are.
Weakley's treatment of Arisaema acuminatum is incomplete. Note the phrase "{additional characters}" in the key.
Yeah, because it’s a work in progress. He and his group are continually updating it as more info and current concepts come up! However, it is still an excellent resource!
@loarie Please let me know if this split will have any unintended effects - the only ones I can find of are the 4 observations with private locations that show up in the A. triphyllum atlas page, although there should be more? In going through all observations identified as A. triphyllum in Florida, no observations currently identified as such are actually A. triphyllum sensu stricto. I hope to slowly cleave off regions of A. triphyllum sensu lato into the new species in this way, if possible.
I'm making sure this split is in good form. I added the counties not previously atlased for A. triphyllum (all on the western border of its range) and atlased A. acuminatum for Florida only, despite it occurring elsewhere, as a temporary fix for this split. When I commit the split, I'm hoping all A. triphyllum IDs in Florida are pushed to complex level, making IDs of A. acuminatum take priority.