Enlarge PhotoRadix Euphorbiae Pekinensis

1 Outer surface greyish-brown or tan, marked with transverse lenticels and stem scars.

2 Cut surface white or pale red, fibrous.

Enlarge PhotoRadix Knoxiae

1 Outer surface reddish-brown or greyish-brown; coarse.

2 Outer surface marked with twisted longitudinal wrinkles.

Radix Euphorbiae Pekinensis and Radix Knoxiae
Root of Euphorbia pekinensis Rupr. (Euphorbiaceae). Root tuber of Knoxia valerianoides Thorel et Pitard (Rubiaceae).
Purging water to alleviate fluid retention. Purging water to alleviate fluid retention; reducing swelling and dispersing stagnation.
Anasarca, hydrothorax and ascites with dyspnoea, constipation and oliguria. Hydrothorax and ascites with constipation and oliguria; carbuncles, sores, scrofula.
Top grades are thick, cut surfaces white. Top grades are big, hard and solid; reddish-brown.
» Radix Euphorbiae Pekinensis's Detail   » Radix Knoxiae's Detail
In the past, Jing Da Ji (Radix Euphorbiae Pekinensis) was the herb commonly used, but it has become less common as supplies from China have dwindled. Nowadays, Hong Da Ji (Radix Knoxiae) is widely used instead in China and Hong Kong. Knoxia valerianoides Thorel et Pitard is not listed in any of the ancient herbs book, and thus is a newly used crude drug. Today, these two herbs are listed separately in the C.P.

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