You said these markings were there last year, too. Did they bloom normally last year? Could we see the bloom?
The name "tiger lily" gets put on several different lilies. A flower pic (from any year) will help us determine which it is. Some of these tiger lilies are very tolerant of viruses, and rarely show symptoms at all, even if they are infected. If you don't have any flower photos, what is the color and does the flower face upward, downward or out to the side? How tall does it grow?
Some viruses cause leaves to curl, but others do not. And curling could be caused by several things other than virus, so it is not a good test by itself.
