Herati design is a very common repeated field design with a flower in a diamond with curving leaves located outside the diamond and parallel to each side. It is also called “fish pattern” because the leaves look like a fish.

A Bidjar rug, West Persia. The madder field with a Herati design enclosed by indigo palmette borders. Bonhams 8 April 2008.
Detail of the Bidjar rug with Herati design. Bonhams 8 April 2008.
A Malayir rug, West Persia. The indigo field with a Herati design enclosed by mid blue meandering vine borders 295cm x 160cm. Bonhams 12 April 2005.
Detail of the Malayir rug. Bonhams 12 April 2005.