In some parts of the Rio Negro, it is called seringueira 
sarapo. Both of these common names have reference to 
fish: the tambaqui is a relatively large and edible fish 
which often is found near the islands where, during the 
fruiting season, Hevea microphylla seeds provide a very 
rich and oily food as they fall into the water. The serapo 
has a pointed head and, according to Froes, this rubber 
tree is called seringueira sarapo because of a rough re- 
semblance of the pointed, conic capsule to the head of 
the fish. 
In many localities of the Brazilian part of the Rio 
Negro, Hevea microphylla is called seringueira barri- 
guda. This name, the same as applied to Hevea 
Spruceana in all its range, refers to the swollen basal 
portion of the trunk. 
In several places along the Rio Negro, I have heard 
the natives refer to Hevea microphylla as seringueira to- 
rada or seringueira de casca torada [meaning “‘toasted”’ ], 
referring to the dark tan-red color and the usual brittle- 
ness of the bark. By this term the tappers distinguish it 
from Hevea Benthamiana in their estradas, for the one is 
never tapped and the other is always an exploitable tree. 
This common name has also been reported for Hevea 
Benthamiana in the Rio Branco of Brazil. 
In Colombia and Venezuela, the name seringa de mono 
(*‘monkey’s rubber’) was given to me in two different 
localities. It is common practice in Amazonian Colom- 
bia to denote a plant as “‘false’” or ‘useless’ in this way ; 
one species of Herrania (a non-chocolate producing rela- 
tive of Theobroma), for example, is called cacaito de mono. 
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