Editing Pinyon pine (section)

== Species ==
{{See also|List of Pinus species}}
[[File:Pinus edulis range map 1.png|thumb|Range of the two-needle piñon, one of the two most important species in the United States]]
[[File:Pinus monophylla range map 3.png|thumb|Range of the three subspecies of the single-leaf pinyon]]
[[File:Pinyon pine Pinus monophylla.jpg|thumb|A single-leaf pinyon from Mono County, California. The short stature and rounded crown are typical of the pinyon.]]
[[File:Grand Canyon Forest.jpg|thumb|A forest of two-needle piñons in Grand Canyon National Park, Arizona]]
Genetic differentiation in the pinyon pine has been observed associated to insect herbivory and environmental stress.<ref name=Whitham>{{cite journal |last1=Whitham |first1=Thomas G. |first2=Susan |last2=Mopper |title=Chronic Herbivory: Impacts on Architecture and Sex Expression of Pinyon Pine |journal=Science |date=1985-05-31 |volume=228 |issue=4703 |pages=1089–1091 |doi=10.1126/science.228.4703.1089 |pmid=17737904|bibcode=1985Sci...228.1089W |s2cid=19048182 }}</ref><ref name=Mopper>{{cite journal |last1=Mopper |first1=Susan |first2=Jeffry B. |last2=Mitton |first3=Thomas G. |last3=Whitham |first4=Neil S. |last4=Cobb |first5=Kerry M. |last5=Christensen |title=Genetic Differentiation and Heterozygosity in Pinyon Pine Associated with Resistance to Herbivory and Environmental Stress |journal=Evolution |date=June 1991 |volume=45 |issue=4 |pages=989–999 |jstor=2409704 |doi=10.2307/2409704 |pmid=28564059}}</ref> There are eight species of true pinyon (''[[Pinus]]'' subsection ''Cembroides''):<ref name=Bentancourt>{{cite journal |last1=Bentancourt |first1=Julio L. |first2=William S. |last2=Schuster |first3=Jeffry B. |last3=Mitton |first4=R. Scott |last4=Anderson |title=Fossil and Genetic History of a Pinyon Pine (Pinus Edulis) Isolate |journal=Ecology |date=October 1991 |volume=72 |issue=5 |pages=1685–1697 |jstor=1940968 |doi=10.2307/1940968|bibcode=1991Ecol...72.1685B }}</ref>

* ''[[Pinus cembroides]]'' – Mexican pinyon
* ''[[Pinus orizabensis]]'' – Orizaba pinyon
* ''[[Pinus johannis]]'' – Johann's pinyon (includes ''[[Pinus discolor|P. discolor]]'' – border pinyon)
* ''[[Pinus culminicola]]'' – Potosi pinyon
* ''[[Pinus remota]]'' – Texas pinyon or papershell pinyon
* ''[[Pinus edulis]]'' – two-needle piñon or Colorado pinyon
* ''[[Pinus monophylla]]'' – single-leaf pinyon
* ''[[Pinus quadrifolia]]'' – Parry pinyon (includes ''P. juarezensis'').

These additional Mexican species are also related, and mostly called pinyons:

* ''[[Pinus rzedowskii]]'' – Rzedowski's pine
* ''[[Pinus pinceana]]'' – weeping pinyon
* ''[[Pinus maximartinezii]]'' – big-cone pinyon
* ''[[Pinus nelsonii]]'' – Nelson's pinyon

The three [[bristlecone pine]] species of the high mountains of the southwestern United States, and the [[lacebark pines]] of Asia are closely related to the pinyon pines.{{citation needed|reason=The lacebark pines belong to a separate section from the pinyon pines, the white pines.|date=January 2017}}