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|In the Chaco region of northern Argentina, a
number of species of the genus Trichocline are
utilized as psychoactive substances. Locals call
them coro or contrayerba.337 Jesuit reports from the
eighteenth century describe how the Calchaqui
Indians used the ground roots to strengthen their
chicha (beer made from maize or other plants).
The Mocovies, Toba, and Matac0338 smoke the
powdered root alone or mixed with tobacco (cf.
smoking blends). The smoke is said to have
medicinal effects upon stomachaches. Today, the
root is also burned alone or with tobacco as an
incense. The most commonly used species are
Trichocline reptans (Webb.) Rob., Trichocline
exscapa Griseb., and Trichocline dealbata (Hook. et
Arn.) Griseb. (Zardini 1975, 649 f.; 1977).
Unfortunately, no chemical studies of the root
have been conducted to date. The roots supposedly
are sold at herb stands in Argentinian
markets in the Chaco region. In Salta, a seller from
Germany offered imported calamus roots (Acoruscalamus) as coro.
Zardini, Elsa M. 1975. Revision del genero
Trichocline (Compositae). Darwiniana
---. 1977. The identification of an Argentinian
narcotic. Botanical Museum Leaflets 25 (3):105-7.