CLASSIFICATION OF AXGlOSPl- RMS. 593 



Agallocha) of Southern Asia and Australia, the juice of wiiicli 

 produces blindness. 



The gum-resin EurnoRBiUM is obtained from /■.uphorbia rcs- 

 inifera, a cactus-like plant of Morocco, and is also found in other 

 species of Euphorbia. It contains, among other constituents. i^'i{ 

 per cent, of an acrid resin, and 22 per cent, of a crystalline prin- 

 ciple euphorbon. 



The milk-juice of several species of Euphorbia is used in tlie 

 preparation of arrow poisons in Brazil. One or more species of 

 tne following genera are used as hsh poisons: Flueggea, I'liyl- 

 lanthus, Bridelia, Excoecaria and Euphorbia. A number of plants 

 are used as remedies for the bites of serpents, as the bark of 

 Phyllanthus mollis of Java and Euphorbia pilulifcra of South 

 America and India. Euphorbia pilulifcra, common in tro{)ical 

 countries, contains an alkaloid, a wax-like substance, several 

 resins and tannin. {Ph. Jour., 2(), July 31, 1909, p. 141.) 



A camphor-containing oil is found in the bark of Pcntalo- 

 stigma quadriloculare of Australia; the aromatic- wood of Col- 

 hquaya odorifera of Chile is used as a substitute for santal and 

 on burning emits a rose-like odor; the leaf of Croton mcntho- 

 dorus of Peru contains an oil with an odor of mentha ; a balsam 

 resembling Copaiba is derived from the bark of Croton oriijani- 

 folius of the West Indies; methylamine is found in Mcrcurialis 

 annua of Europe and other species of Alercurialis. Tannin ij^ 

 found in the following genera: Macaranga, Fhyllantlius and 

 Bridelia; Brazil kino is obtained from a species of Croton (C 

 erythrwus?) of Brazil. A gum-lac is formed on the stems of 

 Aleurites laccifcra of the Antilles and Ceylon as a result of tlic 

 sting of an insect, and contains among other substances a large 

 amount of methyl- and ceryl-alcohols, and a substance resembling 

 abietic acid. The sap of Euphorbia Cyparissias of Europe yields 

 3 resin which is sometimes substituted for scammony. 



A reddish resinous substance resembling dragon's blood is 

 obtained from Croton erythrcma of Brazil; a yellow coloring 

 Drinciple is found in the seed of Croton tinctorius of Mexico: 

 poncetin, a violet coloring principle, occurs in Euphorbia hctcro- 

 phylla of Brazil; a blue coloring principle is found m Chrozo- 

 phora tinctoria of Southern Europe and Africa and in Argitham- 

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