This section is from the "A Manual of Materia Medica and Pharmacology" book, by David M. R. Culbreth. Also available from Amazon: Manual of Materia Medica and Pharmacology.
Opop'anax Opopanax (Chiro'nium). -- S. Europe. Root and stem exude yellowish milk, hardening into reddish-brown tears, having a waxy luster, and a bitter, balsamic taste.
 
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