tragacantha

“The timber is said to dye a fine blue, and the gum, which, exudes from wounds in the bark, bears a strong resemblance to that obtained from the _Astragalus tragacantha_, for which it might, no doubt, be substituted.”

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.

“The tragacanth of commerce is obtained from the A. tragacantha.”

Easton's Bible Dictionary

“Nitrate of potass, 1-1/2 oz. Mucilage of tragacantha, q.s. to make the whole into a stiff paste.”

The Art of Perfumery And Methods of Obtaining the Odors of Plants

“The paste used for filling these "ivory palaces whereby we are made glad," is composed of equal parts of grain musk, ambergris, seeds of the vanilla-pod, otto of roses, and orris powder, with enough gum acacia, or gum tragacantha, to work the whole together into a paste.”

The Art of Perfumery And Methods of Obtaining the Odors of Plants