The Ayahuasca Ceremony

The UDV's 2006 Supreme Court win was a preliminary injunction under the Religious Freedom Restoration Act, not a final ruling. The Court reasoned partly from the peyote exemption the Native American Church had held for 35 years.

Gonzales v. O Centro Espírita Beneficente União do Vegetal, US Supreme Court No. 04-1084, decided 21 February 2006, opinion of Roberts C.J.

Ritual drinking of ayahuasca, an Amazonian brew of Banisteriopsis vine, usually with Psychotria leaves.

Sources3 sources

Primary source

US Supreme Court (Roberts C.J.), Gonzales v. O Centro Espírita Beneficente União do Vegetal, No. 04-1084, 2006, decided 21 February 2006That the Court affirmed a preliminary injunction under RFRA for the UDV's sacramental hoasca, and cited the 35-year regulatory peyote exemption for the Native American Church.
affirm the grant of the preliminary injunction

Scholarship

Luis Eduardo Luna, 'The concept of plants as teachers among four mestizo shamans of Iquitos, northeastern Peru', Journal of Ethnopharmacology 11(2): 135–156, 1984That mestizo vegetalistas believe certain plants, the doctores, teach them to diagnose and cure, usually through magic melodies or icaros.
a series of plants called doctores or plant teachers
Edward MacRae, Guided by the Moon: Shamanism and the Ritual Use of Ayahuasca in the Santo Daime Religion in Brazil (trans. of Guiado pela Lua, 1992), 2006, ch. 4, on the feitioThat in Santo Daime the brew is a sacrament regarded as a divine being, likened to the Roman Catholic consecrated host; ch. 3 adds that followers consider 1930 the year their doctrine was founded.
the brew is considered to be a divine being, akin to the consecrated host