ADULTERATION OP SENNA. 
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lets, which are much larger than those of any other variety ; 
they are also less brittle, thinner, and larger, and are general- 
ly found in a very perfect state, while the other varieties, 
especially the Alexandrian, are more or less broken. 
The leaves of the cynanchum are similar in form to those 
of the lanceolate senna, but they are thicker and stiffer, the 
veins are scarcely visible, they are not oblique at the base, 
their surface is rugose, and the color gray or greenish drab ; 
their taste is bitter and disagreeable, and they are often spot- 
ted with a yellow intensely bitter gummo-resinous incrusta- 
tion. Being less fragile than the leaflets of true senna, they 
are more often found entire, and are very easily distinguish- 
ed from the varieties which constitute true Alexandrian sen- 
na. In their botanical characters they are essentially differ- 
ent, being distinct leaves, and not leaflets, which is the case 
with true senna, 
Lond. Pharm. Journ. and Trans. 
