latex.’? June 12, 1951, Schultes & Cabrera 12431.—Comisaria del 
Vaupés, Rio Kananari, Cerro Isibukuri, at base of mountain. Quart- 
zite. Altitude about 800 feet. ‘‘Large tree. Bark whitish grey, rough, 
Latex very watery, reddish.’’ August 4, 1951, Schultes & Cabrera 
13339.—Same locality. ‘‘Tree 100 feet tall. Latex red only in the 
branches.’’ January 23-25, 1952, Schultes §& Cabrera 15059.—Comi- 
saria del Vaupés, Rio Vaupés, between Mitt and Javareté, Raudal de 
Tapira. In rocky high land covered with humus along rapids. ‘‘Fluted 
tree. Diameter 26 inches. Bark yellowish, tawny, papery, peeling 
easily. Inner bark reddish. No latex. Wood hard, centre reddish 
brown. Height 80 feet. Crown large. Leaves folded at right angles 
along midrib, slightly paler beneath, somewhat crassulent or fleshy. 
Bark on extreme branches whitish yellow. Seeds brown, dull, Cap- 
sules with thin woody wall, thick epiderm green but reddening before 
breaking. Desano= ma-hd-wa-soo. Together with Micrandra Spruceana 
and Hevea pauciflora var. coriacea.’? May 14-24, 1953, Schultes & Ca- 
brera 19344.—Same locality and date. Schultes & Cabrera 19345, 
19346, 19347, 19353.—Comisaria del Vaupés, Rio Papuri, Teresita. 
Caatinga forest. ‘‘Large columnar tree; diameter 18 inches; height 
60 feet. Crown large. No latex. Bark papery, yellowish grey.’? May 
27, 1953, Schultes & Cabrera 19440.—Same locality and date. ““Large 
columnar tree, 60-70 feet tall. Crown large. No latex. Seeds eaten 
after boiling.’’ Schultes § Cabrera 19444.—Same locality and date. 
Schultes & Cabrera 19451. 
All of the collections cited above are from Colombian 
territory, but, in several cases, they were made along 
rivers (the Vaupés and the Papuri) forming part of the 
boundary between Colombia and Brazil. I have seen 
hundreds of trees of Vaupesia cataractarum on the Bra- 
zilian bank, so we must report this species as occurring 
in both countries. It might, also, later be found in that 
part of Venezuela adjoining the Rio Negro and the Rio 
Guainia, even though relatively intensive studies of 
Hevea and Micrandra in that area have not, as yet, dis- 
closed its presence there. 
When I first met with Vaupesia in the field, I thought 
that I had found a new species of Micrandra (including 
Cunuria), notwithstanding the presence of petals. The 
general habit and appearance of the tree is, indeed, so 
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