| Flagger | Content Author | Content | Reason | Flag Created | Resolved by | Resolution |
|---|---|---|---|---|---|---|
| cwbarrows | California Singleleaf Pinyon (Subspecies Pinus monophylla californiarum) |
the subspecies should be elevated to species |
Aug. 7, 2023 19:04:23 +0000 | Not Resolved |
Comments
Looks like a deviation was created some time ago when POWO only accepted P. monophylla: https://www.inaturalist.org/taxa/552668/taxonomy_details
As recently as 10 months ago, POWO had a monotypic treatment of P. monophylla: https://www.inaturalist.org/flags/590249
Now POWO accepts Pinus californiarum: https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:282863-2
But reduces P. monophylla subsp. fallax to a synonym of P. edulis: https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:77095009-1
Elevating P. monophylla subsp. californiarum would require an atlased split of P. monophylla. Do you have a county-level map of the ranges of P. californiarum and P. monophylla in California?
Only the figures in the linked papers. I don't know that I could represent their research confidently, though it does look like at least the individuals in Riverside and San Diego Counties would be californiarum. Might be more complicated north of that.
Would you mind looking over observations in San Bernadino, Riverside, San Diego, Imperial, and Clark counties, as well as Baja California, to see if you can find any overlap in these areas? It looks like a split would only affect these places, if the Buck et al. paper's range map is accurate.
I've reviewed the range data on these taxa, mainly relying on herbarium collections supplemented with some field investigations earlier this spring. Generally they have a climate/habitat divergence with P. monophylla on colder/wetter sites e.g. with Artemisia tridentata, Pinus ponderosa, P. coulteri; and P. californiarum on hotter/drier sites e.g. with Cactaceae, Agavaceae, Fouquiera. P. edulis var. fallax is almost entirely east of the Colorado River. There is some ambiguity in the area from the New York Mtns. to the Spring Mtns., with P. monophylla at higher and P. californiarum at lower elevations and occasional presence of var. fallax. There is also some ambiguity in the eastern Transverse Ranges, e.g. Big Bear Lake to Mt. San Gorgonio, again with P. monophylla at higher and P. californiarum at lower elevations. In this area P. quadrifolia seems to mainly be associated with P. monophylla, which helps simplify the division.
Species added (inactive for the moment) : https://www.inaturalist.org/taxa/1543032-Pinus-californiarum
Taxon swap drafted here : https://www.inaturalist.org/taxon_changes/141698
Top identifiers : @cwbarrows @dalemeister @chris_earle @dgrimmphd @jrebman : do you agree ?
Seems fine to elevate the subspecies.
Yes, I agree with the change.
Yes, I agree with the change.
Change done. Do we need a split ?
Seems to be a good amount of recent molecular evidence:
https://www.ingentaconnect.com/content/aspt/sb/2019/00000044/00000003/art00004
https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.18543
https://academic.oup.com/aob/article/126/3/401/5813433