r- 
, • • . ,i 
4 REPORT ON THE CAOUTCHOUC OP COMMERCE. 
< * 
be varieties, or a second name substituted for the pre- 
vious one. 
Geographic Distribution. — Panure on the Rio Uaupes. 
Also on the Casiquiairi. 
Remarks. — (S. Intea, Spruce.) A tree 70 feet high, 
copious milk, though not so much as S. Brasiliensis , 
speedily turning black on the hands and clothes, and 
staining linen permanently. When dry, very elastic and 
tenacious. I saw a rubber manufactory on the same 
island (at the mouth of the Uaup&s, six or seven miles 
north of the Equator), and. rubber prepared from the 
same tree from which I had gathered my specimens. 
S. apiculata, “ long-leaved Seringa,” straight, tall, not 
very thick tree, smoothish thin bark, and yellow, odori- 
ferous flowers. S. brevifolia , “ short-leaved Seringa,” 
yields less milk than S. lutea. A tree cut down near 
San Carlos measured 100 feet (Spruce). 
8. R. Guyanensis. Aubl. Guyan, p. 871, t. 835 (1775). 
Synonyms. — Jatropha elastica , L. Supp., p. 422 (1781). 
Siphonia elastica , Pers. Enchir, vol. 2, p. 588. 
S. Guyanensis , Juss. 
S. Cahnchu, Willd. sp. pL, vol. 4, p. 567. 
Vernacular Names. — Siringa (Garipon Indians) ; Reve 
(Natives of the Esmeraldas) ; Caoutchouc (Maimas 
Indians). 
Geographic Distribution. — Prencli Guiana. About Barra 
on the Rio Negro. Naturalized in Saint Vincent. 
Remarks.— A tree 50 to 60 feet high, trunk 2 feet to 2 feet 
6 inches in diameter; bark greyish and not thick, 
wood white and light. 
Revece species incerta ; 
Geographic Distribution. — Seringa trees have been found 
to abound on the low islands in mid-river, and along the 
banks of the River Amazons,* from the Island of 
* The River Amazon changes its name three times along its course. From its 
source to its confluence with the Yucayali it is called the Maranon or Maranoa. 
From the Yucayali to the Rio Negro it is called the Solimoes, Solimoens, Alto 
Amazonas or Upper Amazon, and from the Rio Negro to its mouth the Amazon or 
Orellana. The chief tributaries on the left from its mouth are the Tocantins, Zingu, 
Tapajoz, Ramos, Madeira, and Purus. On the right the Rio Negro, with its tribu- 
taries, the Uaupes and Casiquiari, the latter connecting the Amazon with the River 
Orinoco. 
