Cream of tartar used to come from the baobab tree but not anymore.
Now cream of tarter comes from the wine making process.
During the wine making process the cream of tartar is the by product of the wine making which is where it comes from today.
Years ago though the cream of tartar actually did come from the baobab tree by making a powder from the fruits seeds of the baobab tree.
You could make cream of tartar from the baobab tree if you want too and know how but if you buy it then it will be from the wine making process.