Wednesday, March 31, 2010
Varigated Fritillary is one such butterfly with wide distribution, that uses violets. I can't say that I've ever seen it though, and it does use other host plants like may apple and passionflower.
Also note in the picture above all the little 2 leaf violets coming up. Unlike pansies, violets come back every year and usually do good at reproducing. Assuming the right ant species is present too you may see violets popping up far away too. Some violets, but I don't think all, entice ants to plant their seeds for them. This helps the violets spread so hundreds of violets don't end up growing in a small space. It means free plants either way.