That is the same butterfly pattern we used among others in our church bicentennial quilt 2003, we were probably looking for patterns and making the quilt around the same time your mother was! Our Butterfly is batik too! It's nice to know that someone else likes that pattern, I haven't seen any others.
Sorry the quilt is turned on its side! there's the butterfly in the lower right hand corner. The butterfly is a symbol of resurrection - the other resurrection block is second from right on the top row, The Empty Tomb, one that I did. 14 of us worked on it, it was pure bliss!
Maurene White, Montreal