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1 Brittle; easily broken; solid

2 Outer surface brownish-yellow.

3 Root grows vertically.

Radix et Rhizoma Cynanchi Atrati

Root and rhizome of Cynanchum atratum Bge. (Asclepiadaceae).
Clearing heat to cool blood; facilitating urination to relieve stranguria; removing toxic materials to cure sores.
Febrile disease; debility after delivery; urinary tract infection; sore throat, carbuncles and sores; snakebites.
Top grades comprise long, thick yellowish-brown roots, with a bitter taste.

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