Pinus pumila × P. sibirica
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Pinus pumila × P. sibirica is a putative hybrid of Japanese stone pine and Siberian pine. It has not yet been officially described.
Pinus pumila × P. sibirica cones in early spring
Pine cones 1 month after breaking dormancy (on Pinus pumila)
Immature cone from Pinus pumila, it is speculated that this megastrobilus was pollinated by a Pinus sibirica
Hybridization in pines
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Both naturally and artificially occurring pine species can hybridize, combining their genetic material and sometimes creating hybrids that can be more or less vigorous than their parent species. Examp
Pinus pumila × P. sibirica
…with parental species, whereas on the slopes, they acquire a creeping form and can only be distinguished from P. pumila by their large, purple cones. Hybridization in pines…
Pinus × rhaetica in Trentino, Italy
Pinus monophylla × P. edulis foliage
Pinus × holfordiana with its 30 cm cones
Pinus × hakkodensis