According to The New Cactus Lexicon, the genus Lophophora consists of three species. Lophophora diffusa is native in Hidalgo, Querétaro and San Luis Potosí, Mexico, on rocky lands and hillsides. Lophophora fricii is native in the South-West corner of Coahuila, Mexico, also on rocky lands and hillsides. Lophophora williamsii is dispersed from the city of San Luis Potosí, Mexico, to Texas, USA, in various habitats. Hunt classified Lophophora koehresii as a form of Lophophora diffusa. In 2007, the Czeh collectors and researchers, Jarda Šnicer and Vojtech Mysák, together with the Polish Grzegorz Matuszewski, made investigations in the North part of San Luis Potosí, Mexico, where Matuszewski found some Lophophora plants in an extremely small size that where thought Lophophora williamsii seedlings for the first. This small Lophophoras never reach a size larger than 3.5 cm in diameter, but more often, the adult plants has only a size of 1.0 - 2.5 cm. The flower morphology makes it sure that these plants do not belong to Lophophora williamsii. For the further help, the researchers get in contact to the Mexican George Sebastian Hinton who collected the herbarium material on the 1st August 2007 under the ID number GH Hinton 28642. The new taxon was described as Lophophora alberto-vojtechii in honour of the Czech field expert Alberto Vojtech Frič and Vojtech Mysák. The taxon is found in the bordering regions of Coahuila de Zaragosa, Nuevo León, San Luis Potosí and Zacatecas, Mexico, at an altitude of 1600 - 1800 m asl. In its native habitats it lives in fine deposits in that the plants are usually sunken deeply.
