2 REPORT ON THE CAOUTCHOUC OE COMMERCE. 
Vernacular Names : 
Caoutchouc (Maimas Indians, Preach Guiana) ; Cau-cho , Caoui- 
chout ; Cahuchu ; Seringa , Jeringa, or Ciringa (Garipon 
Indians and Portuguese) ; Xermgue (an Indian corruption 
of Sermga : Xeringue in Lingoa Geral means “a liar,” 
Dr. Spruce queries “ a stretcher ”!) ; Bao de Xirringa (Portu- 
guese) ; Borracha (Brazilian) ; Here (Esmaraldas) ; Ycipi 
ddpi or ddpiche (Venezuela). The collectors in Brazil are 
called “ Seringueiros/’ 
Dr. Spruce remarks that all the species of Hevea do not yield 
Caoutchouc of good quality, those of the gap 6* and caatingaf 
producing a brittle gum in small quantity. 
The following is a list of the species of Hevea which have been 
described, their geographic distribution, together with remarks on 
them : — 
1. Hevea Spruceana , Mull, arg., in Linngea, vol. 34, p. 204; De 
Candolle’s Prodromus, vol. xv., p. 716 et seq. 
Synonym. — Siphonia Spruceana , Benth. in Hooker’s 
Jour. Bot., 1854, p. 370. 
Geographic Distribution. — Province of Para.J 
Bemarks.— A smaller tree than Hevea Brasiliensis : 
“ Caoutchouc is collected from it on the Amazon, about 
“ the month of the Tapajoz ” (Spruce in letter to Collins). 
2. H. discoldr , Mull. arg. in D. C. Prod, xv., p. 717. 
Synonyms. — Siphonia discolor , Spruce MSS., Benth. in 
Hook. J our. Bot., 1. c. ; Micrandra ternata , B, Br. PI. 
Jav. Bar., p. 238 ( not a Javanese species J ). 
Vernacular Names.— C£ Seringa de Gap6.” 
Geographic Distribution.— Ega on the Alto Amazonas. 
Common in the gapo of the Bio Negro (Barra), and of 
its tributary, the Bio Uaupes (Panur6). 
Bemarks. — “ The tree scarcely exceeds 25 feet, but the 
fC branches spread out horizontally, sometimes to a con- 
* The “ Gapo ” (lingoa geral) is land inundated by the rivers and lakes in winter, 
constituting a breadth of from 20 yards to several miles, according as the land is 
abruptly ascending or perfectly flat. 
t The “Caa-tingas” or “white forests’* are parts in which the soil is a thin 
covering of white sand over granite. 
t In very special cases only are the collectors, &e. given. The geographic distri- 
bution is based on systematic works on botany and plants in different Herbaria. 
