Note 6 — BOTANICAL AND PHYSIOLOGICAL ASPECTS OF PEYOTE
Reading edition
The most succinct and complete description of the plant is found in Britton and Rose, The Cactaceae, 83-84.
Peyote’s range is comprehended within an irregularly-shaped lozenge from Deming, New Mexico, to Corpus Christi, Texas, to Puebla, Sombrerete, Zacatecas, and back to Deming. That is, the valley of the Rio Grande (north), Tamaulipecan Mountains (east), the watershed of the affluents of the right bank of the Rio Grande de Santiago and Rio de Mezquital (south), and the foothills of the Sierra Madre, the Sierra de Durango and the Sierra del Nayarit (west). It prefers the calcareous and argillaceous soils of the Cretaceous formation in the north of this region.