Editing Pinus jeffreyi (section)

==Uses==
''Pinus jeffreyi'' wood is similar to ponderosa pine wood, and is used for the same purposes. Crystallized sap of ''P.&nbsp;jeffreyi'' has been eaten as candy.<ref name=":1"/> The exceptional purity of {{Nowrap|[[n-heptane]]}} distilled from ''P.&nbsp;jeffreyi'' resin led to {{Nowrap|n-heptane}} being selected as the zero point on the [[Petrol#Octane rating|octane rating]] scale of [[petrol]].

As it mainly consists of n-heptane, ''P.&nbsp;jeffreyi'' resin is a poor source of [[turpentine]].<ref>{{cite web|url=http://plants.usda.gov/plantguide/pdf/pg_pije.pdf|title=Jeffrey Pine|work=NRCS Plant Guide|publisher=USDA}}</ref> Before ''Pinus jeffreyi'' was distinguished from ponderosa pine as a distinct species in 1853, resin distillers operating in its range suffered a number of "inexplicable" explosions during distillation,<ref>{{cite journal |last1=Smith|first1=C. Stowell|date=1914-12-04 |title=Turpentine possibilities on the pacific coast|url=https://books.google.com/books?id=P6hec39aNmYC&pg=PA327 |journal=Proceedings of the Society of American Foresters|volume=IX |issue=1 |pages=327–338 |access-date=2019-12-22 }}</ref> now known to have been caused by the unwitting use of Jeffrey pine resin.