@bluecelery: I sincerely doubt that the jujube or sidra trees native to southern Arabia and previously classified as Zizyphus spina-christi are the same species as the Paliurus spina-christi specimen shown in observation 129282. For one thing, those winged fruit are rather distinctive, and I have never seen anything like them in the wadis of southern Arabia, where Z. spina-christi is a dominant species. I have (decades ago) observed sidra (jujube) trees growing in rocky wadis on the eastern margins of the Negev desert, and they seemed broadly similar to the sidra in wadis further south and did not have winged fruit. I have also observed what I was told was Paliurus spina-christi in a canyon on the border between Azerbaijan and Western Georgia. These were bushes, not trees, and the pattern of leaf growth was distinctly different from that seen in the Arabian sidra. I think Z. s-c and P. s-c ranges may possibly overlap in the Eastern Mediterranean region, and the two are clearly related at the family level, but I doubt they should be lumped together in the same genus, let alone classified as the same species.

Hmm, looks like this may be related to the issue where iNat does not explicitly distinguish between matching names that have different authors, in this case:
Ziziphus spina-christi (L.) Desf. = accepted
vs.
Ziziphus spina-christi (Mill.) Georgi which is apparently jr. synonym to Paliurus spina-christi Mill.

If someone would be so kind to explain me how to reassing a previously synonymized taxon I would be glad to solve this issue.
Thanks!

Was something done to that? As observations with swapped taxon stayed so, with RG for the wrong species.

For Africa, the remaining P. spina-christi observations are clearly Paliurus. Would be good to have a look especially at observations from the Middle East.