Is it possible that the larches cultivated in parks and gardens might have triple hybrids (for example by morphological determinate L. decidua x sibirica x kaempferi etc.)? Doesn't this contradict to the very concept of a species? Isn't it just impossible ? Obviously, the age of particular trees and the history of introduction may also play part here.
Sander, H., Uusikivi, T., Läänelaid, A., Pärn, H. 2007. Uusi lehtikuusen risteymä Virossa (A new larch hybrid discovered in Estonia) – Sorbifolia, 38(3), 99-107.
Of course, normal Larix double-hybrids is widely observed, especially for seedlings growing from seeds, which collected in dendrariums or arboretums, where different Larix species grows together. So, examples of L. decidua x kaempferi is relatively easy to identify and such combinaton can find in some parks in Baltics.
Identification of triple hybrinds by morphological features (at this case - coin morphology) - it is really impossible or nearly impossible. Coins of mentioned triple hybrid( pictures in Sorbifolia publication) looks like L. cajanderi or some other Far East Larix complex species. I am indeed not sure, that this triple hybrid is identifyed correctly.
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