ABSTRACT
Labdanum resin consists of the secretion of the glandular hairs covering the inferior part of the leaves (spring and summer). The hairy leaves and twigs are treated with boiling water, and the floating resin is skimmed from the surface. Crude labdanum resin is a dark brown, semisolid mass with a very pleasant, balsamic odor reminiscent of ambergris and a bitter taste.
