Employed widely in the Colombian Putumayo and adjacent 
Ecuador as a caffeine-rich stimulant, yoco apparently is 
represented by several ecotypes, recognized by the natives and 
given names but to the botanist seemingly indistiguishable. More 
field work and more meticulous studies of the liana are required 
before a complete understanding of the variants known in the 
native pharmacopoeas is available. 
According to the collections cited above, the Kofan Indians 
recognize two ecotypes under the names fo-to-oa-yoko (“white 
yoco”) and cu-i-yoko. Pinkley 380 indicates that totoayoko “has 
more /eche [latex] than other types of yoko, therefore is the best 
type.” 
Serjania sp. 
Crushed leaves of this Serjania are dried and applied to sores of 
the mouth by the Kofans of Ecuador. The Kofan name of this 
medicinal plant is si-si-pak-opifa-sehe "-pa(H. V. Pinkley 220 and 
420, cited in Pinkley: loc. cit.). 
Saponins and pyrrolizidine alkaloids have been reported from 
the genus Serjania (Gibbs: loc. cit. 3 (1974) 1708, 1710). 
BALSAMINACEAE 
Impatiens sp. 
An infusion of the flowers is taken internally for sore throat by 
the Kofans of Ecuador (H. V. Pinkley 447 and 1973, cited in 
Pinkley: loc. cit.) The Kofan name is carakuchu-sehe ‘-pa. 
Polyphenols and naphthoquinone are reported from the genus 
Impatiens (Hegnauer: loc. cit. 3 (1964) 229-231). 
STERCULIACEAE 
Herrania Camargoana R. FE. Schultes in Bot. Mus. Leafl., 
Harvard Univ. 14 (1950) 120. 
BRAZIL: Estado do Amazonas, Rio Cauaburi, Maturaca. “Single slender 
trunk. Height 20 ft. In flood forest. Fruit brownish red with fleshy pseudospines 
at junction of ribs and cross ridges. Alkaloid negative.” July S-August 12, 1967. 
R. E. Schultes 24572 (Alpha Helix Amazon Expedition, 1967). 
pz) 
