Allen in 1943, along the Rio Papuri, an affluent of the 
Rio Vaupés; in the following year, I collected it from 
La Pedrera on the Rio Caqueta and on the Rio Miriti- 
parand (Baldwin and Schultes loc. cit. 842; Schultes in 
Caldasia 8 (1945) 247-249). In 1948, more material was 
collected from La Pedrera. 
A most important discovery, however, is that of Lopez 
who, in September 1948, collected Cunuria Spruceana 
from the headwaters of the Rio Hamacayacu, an affluent 
of the Amazon above Leticia. Later, L6opez and I located 
a number of trees of this species in the immediate envi- 
rons of the town of Leticia. Known from a locality in 
adjacent Peru and from points on the Ica and at Sao 
Paulo de Olivenca on the Amazonas itself, Cunuria 
Spruceana was to be expected near Leticia, even though 
several years of intensive collecting had previously failed 
to disclose its presence there. In the trapécio amazénico, 
this species occurs sporadically, not in abundance as often 
is the case in other areas. Cunuria Spruceana has no dis- 
tinctive common name in the Spanish, Portuguese or 
Tikuna languages in the Leticia area, so far as we could 
learn. 
Cotoms1A : Comisaria del Vaupés, Rio Papuri, vicinity of Santa Tere- 
sita. ““Tall trees averaging 35 m. in height, and 80 cm. in diameter 
above the conspicuously developed and unique stilt buttresses which 
are produced toa height of 3-4 m. as laterally compressed board-like 
flanges which act as flying buttresses, the bases widely detached from 
the trunk, the arch often high enough for a man to walk upright be- 
neath. Leaves simple, with two basal disk-like glands. Inflorescence 
of small green flowers from axillary growth. Large trispermate capsule 
typical of Hevea. Bark very thin, 6-8 mm., with scanty latex which 
coagulates with difficulty, producing a non-elastic gum. Seeds col- 
lected by the local Indians for food. Known as wah-puh (Tukano).”’ 
August 15, 1943, Paul H. Allen 3063,—Comisaria del Amazonas, Rio 
Hamacayacu. ““Tree 80 ft. tall with huge buttress roots. Flowers 
yellowish. Latex very thin, white. Bark hard, brownish, thin. Wood 
white.’’ September 1948, Francisco Lépez 1.—Comisaria del Ama- 
zonas, Rio Hamacayacu. ““Tree 60 ft. tall with large buttress roots. 
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