Strained tomato pulp is a nice addition, but a teaspoonful of lemon juice will suffice.
This was a famous plantBixa Orellana, Roucou; and that pulp was the well-known Arnotta dye of commerce.
On all these islands there is found a tree about the size of our elms, which bears a sort of gourd out of which they make drinking cups; but they never eat it, as its pulp is bitterer than gall, and its shell is as hard as a turtle's back.