(Chris Earle's links did not transfer when I copied his note)
Pinus × kohae
Arizona Singleleaf Pinyon
Pinus × kohae
Genetic analyses reported in Buck et al. 2023 indicate all single-leaf pines in this area belong to P. x kohae. Start HERE and you will find all the relevant papers cited, as well as a description of how to tell the 1-needle pinyons apart.
I duplicated the record for this and deleted the old record. Thank you for adding the links to the papers for this.