"Hoary Comma", what a name for a butterfly

Boy, I thought birds got funny names but I think butterflies sometimes get stuck with some goofy names and the Hoary Comma is a good example. As can be seen from this pic I took of a Hoary Comma on the Canon City Riverwalk, they are pretty little butterflies. No, not spectacular but they are attractive. They are from a group called "Commas", but why on earth did these get named "hoary"?

According toButterflies thru Binoculars-the West they are common from early spring to late fall throughout much of Colorado and other western states. It also says their food source is currents-interesting. I certainly do see them often on the Canon City Riverwalk.
SeEtta