I once puchased 25 or so Larch seedlings. (Today these trees approach 25 feet high (8 metres)). They all appear to be classic European Larch (Larix decidua) except one! The "oddball" has scales that are curled over (even exposing the wings of the seeds within the cone). The wings are curled over against the scale as well. The branchlets do not droop. There is a blue cast to the foliage (rather than the green cast in the European). As well the tree is fuller, bushier and the clusters of needles are more numerous. The tree and its cones are healthy and the cones are full of seed so I don't think i am looking at insect damage or something of a pathogenic nature. See attached photos. I have included a L. decidua cone for comparison.