Pulque is a milky, slightly foamy and somewhat viscous beverage made by fermenting (not distilling) the fresh sap of certain types of Maguey. Any other beverage made from distilling the cooked Maguey is Mezcal, and if it is manufactured in the Tequila region from a numbered distillery, it is Tequila. All three drinks are made from different species of Maguey, often called the "Century plant" in English. The Maguey or agave are all members of the botanical family Agavaceae. Only one species of Maguey is allowed by law for tequila production, the agave Weber (the Blue Agave). There are many species that can be used for good mezcal, and six or so varieties will yield the basic juice for flavorful Pulque