of granitic peaks in the upper Rio Negro and lower Rio 
Uaupés in Brazil (of the same age as the granite at San 
José del Guaviare) has indicated that it is apparently not 
present on Serra Curicuriari, Serra Cocui and similar 
mountains of the area. Indeed, during my explorations 
in the upper Rio Negro basin in 1947-48, I found no 
species of Senefeldera whatsoever. 
Cotomsra: “‘Rio Guaviare, San José del Guaviare. Terrenos gran- 
iticos, sabana, 270 m. alt. Arbol latex.’’ 12 septiembre, 1939, J. 
Cuatrecasas 7682 ( U.S. Nat. Herb. 1774175). 
HIppocRATEACEAE 
Tontelea attenuata Miers in Trans. Linn. Soe. 
London Bot. 28 (1872) 884. 
According to A.C.Smith (in Brittonia 8 (1940) 474), 
this beautiful, low tree is known from the original Spruce 
collections in the Rio Negro country of Brazil, from the 
basin of the Rio Madeira of Brazil, and from British 
Guiana and eastern Peru and Colombia. Schultes 5385 
represents the second collection from Colombia. The 
first was Klug 1967 from the Putumayo, a great distance 
from the Vaupés locality cited below. 
Cotompra: Comisaria del Vaupés, Macaya—Ajaju River confluence, 
Mount Chiribiquete. Quartzite base. Summit 800-1200 ft. above 
forest floor, 1700-2100 ft. above sea level. ‘‘Small tree. Flowers 
white, probably turning brown. Odour of cinnamon pronounced. Bark 
smooth, brown. Along banks.’’ May 15-16, 1943, Richard Evans 
Schultes 5386. 
SAPINDACEAE 
Paullinia scaberula FP. Ll’. Schultes sp. nov. 
Vitis parva. Rami graciles, fusco-rufo cum cortice et 
pilis nigris debilibus usque ad 6 mm. longis et dense 
saetigeribus armati. Ramuli subteretes, similes. Folia 
quinquepinnata, usque ad 80-85 cm. longa, 25 cm. lata. 
Rhachis nuda (exalata), firma, scaberula nigris cum pills, 
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