Does not look familiar to me. My Mom's tiger lilies were true lilies, not daylilies. Your photo shows a daylily. Maybe it was a knickname?
I did find this link for true lily "tiger lilies"
http://gurneys.com/product.asp...
This link shows daylily "tiger lily". Which they say is the species fulva.
http://www.gardenersnet.com/bu...
I have grown fulva, and yours does not really look like fulva to me.
