The Mazatec and other indigenous Psilocybe using groups tend to take the view that different species of mushroom have different qualities or their own ‘signature’. Some are revered more than others or used for specific purposes. This view is shared by ethnobotanist Kathleen Harrison, who has worked extensively with the Mazatec and various Psilocybe species, and is commonly echoed by experienced growers and psilonauts. In the context of indigenous mushroom usage, the more potent species tend to be revered more highly. There are 53 known species of Psilocybe mushrooms in Mexico, with around a third of these used ceremonially. Only a handful of species are frequently employed in veladas. Of these, the most important and commonly used species are P. caerulescens, P. mexicana, P. cubensis, P. zapotecorum and P. hoogshagenii.7 In the Aztec language Nahuatl the umbrella term teotlaquilnanácatl (“divine mushroom that describes or paints”) is applied across species.

The Mazatec hold P. caerulescens, known as the landslide or derrumbe mushroom, in particularly high regard. This species is thought to have likely been used by the Aztecs in their rituals, as documented by 16th century Spanish chronicler Bernardino de Sahagún, and referred to as teonanácatl (“flesh of the gods”). It was this species through which R. Gordon Wasson and Tim Leary had their seminal introductions to psilocybin. It is revered for its potency and its fuerza or force, the mushrooms produce a strong, physically medicinal effect, sometimes experienced as deep waves of warmth and energy in the body.