Makuna call it o0-too-mee-ko; the Mirana, do-ro-he; the Tani- 
muka, ya-poo-moo-ho,; the Yukuna, ka-sd-ra (“beetle tree’’). 
Mayna toxica R.E. Schultes in Rhodora 65(1963)16, t. 10. 
CoLoMBIA: Comisari del Amazonas, Rio Caqueta, La Pedrera and vicinity, 
Quebrada Tonina. On high land. **Small tree, 20 feet tall. Flow- 
ers white.” October 5, 1952. R.E. Schultes et 1. Cabrera 17731. 
The Mirana Indians of the La Pedrera region assert that 
formerly the bark of seeds of this tree were given to dogs as a 
poison. The same uses have hitherto been reported (Schultes, 
R.E. in Rhodora loc. cit.) from the Vaupes and for other Indian 
tribes. It was then indicated that: ‘“*The fact that at least two 
species — Mayna muricida and M. toxica — are similarly 
employed for their toxic properties by Indians in far-separated 
parts of the Colombian Amazon suggests that an investigation 
into the chemical constituents of this genus might be of inter- 
est.” 
Ryania angustifolia(Turcz.) Monachino in Lloydia 12 (1949) 21. 
COLOMBIA: Comisaria del Vaupeés, Rio Vaupes, Mitu and vicinity. “Small 
tree in secondary growth. Flowers white. Leaves and twigs: 
alkaloid doubtful. Bark: alkaloid negative.’’ September 27 - 
October 20, 1966. R.E. Schultes, R.F. Raffauf et D. Soejarto 
24175, 
The root, although not used, is considered poisonous by the 
Kubeo Indians. 
One species, Ryania dentata Miq., has been reported as an 
ingredient of an arrow poison in Colombia (Mezey, K.: Rev. 
Acad. Col. Cienc. Exact. Fis. Nat. 7(1947)319. 
Sundry species of Ryania are recognized in South America 
as poisonous. The toxicity is due presumably to a glycoside 
(Merz, K.W.: Arch. Pharm. 268(1930)592; Nakarai, S. et T. 
Sano: Arch. Pharm. 272(1943)1). 
COMBRETACEAE 
Combretum Cacoucia Exe// in Kew Bull. 1931(1931)469. 
BRAZIL: Estado do Para, Utinga, Belem. ‘‘Rabo de arara. Extensive liana. 
pe) 
