262 



BARKS 



this variety of yellow bark as calisaya bark. It was formerly imported 

 in two distinct varieties, viz. (a) flat and (b) quill calisaya, but the 

 former' is'now seldom seen. 



(a) Flat calisaya was formerly imported in thick, flattish, heavy 

 pieces 20 cm. or more in length, from 5 to 10 cm. in width, and varying 

 frequently from 6 to 12 mm. in thickness. The inner surface was 

 tawny yellowish brown in colour and showed a close fibrous structure, 



FIG. 132. Calisaya bark. A, showing]the longitudinal 

 fissures and transverse cracks, natural size ; B, 

 showing in addition exfoliating cork, natural size. 



the undulating course of the fibres often communicating a wavy 

 appearance to the bark. The outer surface was darker and marked 

 with broad, shallow, longitudinal depressions (digital furrows). These 

 were caused by the formation in the bark of concave lines of cork, by 

 which shallow curved pieces of the bark had been cut off. This outer 

 bark was commonly removed from the drug before exportation. 



(b) Quill calisaya. This, which at present is the variety of calisaya 

 bark commonly seen, is principally obtained from plantations of C. 

 Calisaya in Bolivia and Java. It occurs in quills varying usually 

 from 12 to 25 mm. in diameter and 30 cm. or more in length, fine 

 specimens attaining 60 cm. in length and 5 to 8 cm. in diameter. The 



