The Rubaiyat of Omar Khayyam:
1991 Peter Pauper Press Grace Scharr/Scharr Design Edition

This 1991 edition is from the Peter Pauper Press, and has illustrations/decorations from Scharr Design (or Grace Scharr?). The title page credits Scharr Design but the front flap says specifically Grace Scharr for the jacket illustrations. This website, seemingly of hers, corroborates that.

This edition is part of a greater collection from Barbara Campbell that I purchased a portion of.