Trombetas lies more than 1200 miles in a straight line 
from the eastern slopes of the Colombian Andes, where 
we are expected to believe that the natives are using this 
rare species in relative abundance as the source of their 
frequently employed yaye. The chances that Prestonia 
amazonica is used are, for all practical purposes, non- 
existent; and there seem to be no indications that any 
species of Prestonia is so employed along the eastern 
slopes of the Colombian and Ecuadorian Andes. Even in 
the area where Spruce reported its possible use a hundred 
years ago, there is all probability that it was employed 
solely as an admixture with Banisteriopsis Caapi. 
In the region through which the Rio Vaupés flows, 
the Indians distinguish two kinds of caapi. Spruce re- 
ported the minor caapi to be called locally caapi-pinima. 
Koch-Griinberg (12) found that the Tukanos of the 
Vaupés know two kinds, but he could identify only one. 
In 1948, Schultes (28) discovered the Indians on the Rio 
Tikié, a Brazilian affluent of the Uaupés, preparing a 
narcotic drink from the malpighiaceous genus 7'etrap- 
terys. He described the new species Tetrapterys methy- 
stica on the basis of a flowering specimen from the forest 
liana. From the bark a definitely hallucinogenic drink 
was prepared. The drink was rather yellowish, unlike 
the usually chocolate-brown of the drink prepared from 
Banisteriopsis Caapt.. One wonders whether or not the 
term ‘‘painted caapi’’ could be applied to the kind of 
caapi that makes the unusual yellow drink. Be that as it 
may, the drink prepared from Tetrapterys represents 
probably the second kind of caapi reported by Koch- 
Grinberg in 1909. 
SUMMARY 
While we are careful to point out that further field 
work, especially in Spruce’s area along the Brazilian Rio 
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