Original sentence: For this same reason, it is widely, but erroneously, believed that the drink is made from the flowers of a non-existent "Jamaica plant".The latter name, "Agua de Jamaica" is technically incorrect though in common usage in Mexican Spanish, since the name of the plant is "Flower of Jamaica" (Flor de Jamaica), not "Jamaica", as many untrained consumers mistake the calyces of the plant to be dried flowers
Edited sentence: Also, since many untrained consumers mistake the calyces of the plant to be dried flowers, it is widely, but erroneously, believed that the drink is made from the flowers of the non-existent "Jamaica plant".The latter name, "Agua de Jamaica" is technically incorrect though in common usage in Mexican Spanish, since the name of the plant is "Flower of Jamaica" (Flor de Jamaica), not "Jamaica"