Mexico—Connarus lentiginosus Brandg. of Chiapas—is 
not known to be utilized medicinally, but ethnobotanical 
studies have not been pursued in the region. 
The red sap of Connarus Schultesii may contain color- 
ing constituents, but the Chinantecs and neighboring 
Zapotecs apparently do not make use of them as a dye. 
Connarus Sprucei Baker in Martius FI. Bras. 14, 
pt. 2 (1871) 187. 
Cotomsia : Comisaria del Vaupés, Rio Kuduyari, near mouth. ‘‘Vine. 
Flowers white. Bark employed as fish poison.’’ August 12, 1960. 
RE. Schultes 22576. 
The bark of the root and stem of this riverside liana 
is employed by the Kubeo Indians as a fish poison. 
Spot tests for alkaloids, made on the bark of the spe- 
cies, proved to be negative. 
Rourea glabra Humboldt, Bonpland et Kunth. Nov. 
Gen. et Sp. 7 (1825) 41. 
CoLomsia: Comisaria del Amazonas, Rio Karaparana, between the 
mouth and El] Encanto. Alt. about 150 m. ‘‘Small tree. Fruit red 
with blackish blue husk.’? May 22-28, 1942. R.E. Schultes 8831. 
The Witoto Indians use the root and stem bark of 
Rourea glabra as a fish poison. This small tree or vine is 
rather common in pockets along the flood-banks of the 
Rio Karaparana. Although it is a widespread species, 
occurring in Central America, the West Indies and tropi- 
cal South America, no uses seem to have been reported 
for it beyond the employment of a decoction as a gargle in 
treating catarrhal conditions (Schellenberg, loc. cit. 214). 
Two vernacular names for the plant in Brazil—mata ca- 
chorro (“dog killer’’) and mata negro (‘‘negro killer’*)— 
do, however, suggest poisonous properties. The fruit and 
root bark of Rourea erecta (Blanco) Merr., an Asiatic 
species, are reputedly poisonous to dogs and other car- 
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