186 ECONOMIC BOTANY. 



1871. KAMALA. A peculiar sort of Kamala, evidently not derived 

 from Eottlera tinctoria, Roxb., has been imported from Aden. 

 Nothing is known of its place of growth or of the plant by 

 which it is afforded. (PHARM. JOURN. ix. (1868), p. 179.) 



Kousso. Fresh seeds of the Kousso tree, Bray era anth.dmin- 

 tica, Kunth, should be procured for cultivation. 



GUM ARABIC. Acacia Verek, Guill. et Perrott., a tree growing 

 all over the northern part of Central Africa, from Senegambia 

 to Abyssinia, is said to produce the best sort of gum arabic. Frag- 

 ments of the stem, with the gum exuding, from Western as well 

 as from Eastern Africa, are requested, in order to ascertain the 

 identity or diversity of the gum produced by one and the same 

 plant in different localities. 



CALUMBA ROOT. Whether this drug is furnished wholly by" 

 Jateorhiza Columba, Miers, or in part by /. Miersii, Oliv., both 

 of them plants of Mozambique (but the latter found also in 

 Madagascar), is not known. Travellers visiting the localities 

 where the drug is collected should obtain good specimens of the 

 plant, as well as living roots, which are fleshy and easily trans- 

 ported without earth. 



TANGHIN of Madagascar (TangJiinia venenifera, Poir.). A 

 specimen is requested of the poisonous milky juice. A portion 

 should be partially dried with a gentle heat ; another portion 

 should be mixed with spirit of wine and sent in a fluid state. 



CAOUTCHOUC, or INDIA-RUBBER. In Madagascar, as well as in 

 Mozambique, there are several trees said to yield this substance. 

 Good specimens and definite information should be collected. 



INDIA, SIAM, AND THE INDIAN ARCHIPELAGO. 

 CATECHU, vide page 177. 



BENZOIN, or GUM BENJAMIN. It would be interesting to ob- 

 tain good specimens of the tree which affords this drug in Siam 

 in order to compare them with Styrax Benzoin, Dryand., which 

 produces the Benzoin of Sumatra. 



