Sumac
From London's Ghost Acres
Sumac is a powder created from leaves of plants in the genus Rhus. The powder is used in the tanning process of converting animals skins and hides into leather (Watt 1885, 77-78).
Database name: Shumach
https://books.google.ca/books?id=2fMHAAAAQAAJ&dq=leather%20manufacture&pg=PA77#v=onepage&q&f=false
Imported from