Unfortunately, yes, yours is quite unmistakable. L. formosanum is very susceptible to viruses, and if you have vectors present to spread them (like aphids), it is probable that you have a lily or lilies that is tolerant of virus that "gave" it to your formosanum. Lilies tolerant to viruses don't show symptoms. So your formosanum is the "canary in the coal mine".
It's not the end of the world since lots of lilies are virus tolerant. That is, unless you need to grow L. formosanum. New formosanum plants, even from seed again, will become infected and be symptomatic until you find the innoculum source. Most lily breeders try to breed in virus tolerance in their introductions to make them more resilient.
But you will want to destroy them, and disinfect anything that has come into contact with them. Just like a cold virus, a lily virus can be manually spread, too.
