Agave maintenance once established. "Agave azul" (blue agave) is used in the production of tequila. In 2001, the Mexican Government and European Union agreed upon the classification of tequila and its categories. All 100% blue agave tequila must be made from the "Agave tequilana" 'Weber's Blue' agave plant, to rigorous specifications and only in certain Mexican states. The hybridized genus ×"Mangave" is created by cross-breeding species of "Manfreda" and "Agave". The ethnobotany of the agave was described by William H. Prescott in 1843: But the miracle of nature was the great Mexican aloe, or maguey, whose clustering pyramids of flowers, towering
Agave schottii direct sunlight. Individuals of this species are flowering shrubs. The "Agave schottii", like other "Agave" species, are succulents with a rosette of thick, blue-green, finger-like leaves with sharp spines on their tips. The "Agave schottii" is different from other "Agave" in that the leaves do not have spines on its edges, which makes it a member of the "Agave" subgenus Littaea. Its leaves typically grow to a length of about 0.3 meters (0.98 feet). Because its height is about that of a human's shin, and because it has sharp, spiny leaves, this species has been given the common name "Shindagger."