They are sometimes called Persian berries.
"The Commercial Products of the Vegetable Kingdom" by P. L. Simmonds
In Schedule A alone the list of necessities on which the tax is to be raised includes Persian berries, extract of nutgalls and isinglass.
"Love Conquers All" by Robert C. Benchley
Persian berries, 69, 71.
"The Dyeing of Woollen Fabrics" by Franklin Beech
Persian berries, 156, 178, 179.
"The Dyeing of Cotton Fabrics" by Franklin Beech
Yellow is often produced from Persian berries, turmeric, saffron, and sumac.
"Rugs: Oriental and Occidental, Antique & Modern" by Rosa Belle Holt