The article does say, though: > “The problem is that we were warned of nothing,” Mr. Guiraud said. The museum sent specimens from the Lagenophora family, which

The article does say, though: > “The problem is that we were warned of nothing,” Mr. Guiraud said. The museum sent specimens from the Lagenophora family, which includes daisies, and was notified that a quarantine document was missing. “We filled it out and sent it,” Mr. Guiraud said, adding that the paperwork was in order. Two weeks later, the museum learned the specimens had been destroyed. So it's not completely obvious where the fault was. Having some experience with French administration though, they're probably faulty in at least some part. Also, it's not really just "a Paris school" but the oldest Natural History museum in the world with one of the largest collections (I've actually worked and collected specimens for them, too). So they do have some experience in sharing and handling their collections, which is why I don't think they can be entirely at fault there.