ra on the Rio Caqueta (Japura) in eastern Colombia. It 
is known from a single Peruvian locality near Iquitos in 
Loreto and has been collected from the high plateau be- 
tween the Rio Livramento and the Rio Ipixuna, tribu- 
taries of the Madeira, in Brazil. 
To these records we may add reports which suggest 
other areas where Cunuria possibly exists. South of the 
mountains in the Guianas where the genus has been col- 
lected, ‘‘there are some hills off the Rio Trombetas and 
near the Lago de Sapucua, known as Cunuri mountains, 
.... probably reaching four hundred feet’’ (Brown, 
C. B. and W. Lidstone: Fifteen thousand miles on the 
Amazon and its tributaries (1878) 241). Since the name 
cunurt is commonly applied to various species of Cunu- 
ria in Brazil and since the genus often dominates the 
slopes of such low mountains, as observed on Cerro de 
La Pedrera by Schultes and at Montepelago on the Rio 
Uaupés by Baldwin, we presume that Cunuria is com- 
mon on the hills designated by Brown and Lidstone. 
These hills are probably the ones now known as Serra de 
Sapucua. In 1943, a native rubber producer wished to 
demonstrate to Baldwin a new kind of buttressed rubber 
tree which might well be a representative of Cunuria. 
In the Rio Madeira region, Schultes heard repeated ref- 
erences to gigantic, buttressed rubber trees which were 
locally known as pae da seringueira—“*‘ father of rubber 
trees.’’ These are reputedly abundant west of Humayta, 
between the Rio Madeira and the Rio Purts, and they 
may belong to Cunuria. 
If the theory be accepted that an inland sea, opening 
westward, once covered a great part of what is known 
as the Amazonian planada, Cunuria might be considered 
to be an element of the flora of the heights fringing the 
shores of the sea. Accordingly, one would reasonably 
expect additional collections of Cunuria to help indicate 
[ 330 | 
