These trees are all past the amphitheatre down at the north end of the garden. Here's Larix marschlinsii The middle part of the accession number, 0075, means that the origin is unknown. The last part of the number, the year, is usually the year the tree was acquired, but in this case, it's the year the accession was recorded or re-entered (I think I'm close to remembering the right story on this). Even past the larch are two of these very cute Pseudolarix amabilis.
The larch looks like normal European Larch L. decidua, no sign of any hybrid influence. But true that 2nd and 3rd generation hybrids can get to look very like either of the parent species.
