DEFINITION

Salix Species Bark is prepared from the whole or fragmented dried bark of the young branches, or whole dried pieces of the current-year twigs, obtained from Salix species (Fam. Salicaceae). Common in pharmacopeial use are S. alba L., S. babylonica L., S. daphnoides Vill., S. fragilis L., S. chilensis Molina, S. pentandra L., S. purpurea L., and a number of other complying willow species and their hybrids. It contains NLT 1.50% of total salicylate derivatives, calculated as salicin (C₁₃H₁₈O₇) on the dried basis.