The dry root bark: irregularly rolled up, tubular pieces, 5-15cm long, 0,4-1,4cm in the diameter and approx. 0.2 cm.
The external surface is coloured grey-brown and shows weakly stooped frowning as well as across-put, long pores; the inside is pale-yellow or grey-yellow coloured and shows fine lengthwise line.
Light specific weight, friable consistency, slightly breakable with irregular break.
Weakly aromatic smell,
weakly sharp and bitter taste.