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Elsewhere on the web
Then of wood colours we have further: quercitron, Persian berries, fustic and the tannins or tannic acids, comprising extracts, barks, fruits, and gallnuts, with also leaves and twigs, as with sumac.— The Chemistry of Hat Manufacturing Lectures Delivered Before the Hat Manufacturers' Association
America, are used by dyers under the name of quercitron.— The Commercial Products of the Vegetable Kingdom Considered in Their Various Uses to Man and in Their Relation to the Arts and Manufactures; Forming a Practical Treatise & Handbook of Reference for the Colonist, Manufacturer, Merchant, and Consumer, on the Cultivation, Preparation for Shipment, and Commercial Value, &c. of the Various Substances Obtained From Trees and Plants, Entering into the Husbandry of Tropical and Sub-tropical Regions, &c.
I alphabet these, too: alkanet-root, annatto, barwood, blackberry, blue-vitriol, brazil-wood, burnt sugar, cochineal, elderberry, garancine (an extract of madder), indigo, Nicaragua-wood, orchil, pokeberry, potash, quercitron, red beet, red cabbage, red carrots, saffron, sanders-wood, turmeric, whortleberry.— The Humbugs of the World An Account of Humbugs, Delusions, Impositions, Quackeries, Deceits and Deceivers Generally, in All Ages
Then to same bath add 10 to 12 parts quercitron and continue boiling for 15 minutes, then add 1 part of chalk, this addition is repeated at intervals of 6 to 8 minutes till a fine green is brought out.— Vegetable Dyes Being a Book of Recipes and Other Information Useful to the Dyer
Yellow, 35-39 for cotton (weld), 50 for linen (lichen), 19 for silk, 57 from weld, 35 dyer's broom, 38 fustic, 37 heather, 39 lichen, 19, 22, 23 privet, 39 quercitron, 38 sumach, 41— Vegetable Dyes Being a Book of Recipes and Other Information Useful to the Dyer

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