The usually accepted name for Dunkeld larch is Larix xleptolepis,
Oops. I meant Larix xeurolepis. L. leptolepis is the old name for L. kaempferi,
one of the parents.
A quick Web search shows that Dunkeld larch still goes by both names. A history
of the tree is a bit cloudy. The Japanese larch was introduced to the Atholl
Estates, & the Dunkeld larch subsequently developed & was planted there. So is
it a true natural hybrid altogether?


Iris,
Central NY, Zone 5a, Sunset Zone 40
"The trouble with people is not that they don't know but that they know so much
that ain't so."
Josh Billings (Henry Wheeler Shaw), 1818-1885