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pelago, are still a ^crz-cz incognita to the naturalist. But 

 it is not to such little traversed realms alone that wc 



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J, /egetable productions, par- 



look for new and interesting \ 



ticularly of the more useful kinds. The remainder of 

 this article shall be devoted to a mention of some of the 

 many plants, or peculiarities relating to the substances'' 

 derived from them, which are yet unknown, oi 



very im- 



wn 



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je thenij according to their 



lands. We shall arrai: 

 countries, as follows : 



Asia {including Australia). 



ilsM Being sent by way of the Red Sea, it may be remarked that some 

 of the products, enumerated under this head, are derived from Abys- 

 sinia, Arabia, or the East coast of Africa.! 



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Ammoniacum. — Determine the true origin of this f 



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rsia, 



resin hy specimens of the plant yielding it in Pe 

 forty-two miles south of Ispahan. Another kind is equally 

 worthy of inquiry from Morocco in Africa, with the gum- 

 resin and exact locality. 



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Sagapenum. — A gum-resin 



its source ? It ^^ said to 



a Ferula. 



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come from Persia, and to be derived from 



Specimens of the plant with the gum-resin which it affords 

 are desirable. 



Galhamim. ~^\^\iQ.iwQ obtained? It is brought to us 

 from Singapore and Persia. 



6?aw%e.— Specimens in flower, and fruit of the plant 

 affording the gamboge of Siam, and the mode of extracting 



this and other kinds of gamLuge, such as that of Cey- 

 lon, &c. 



^ * For much of this Catalogue of Desiderata and Inquirenda I ^m 

 indebted to notes from Dr. Royle, Dr. Pereiia, and Dr. E. D. Thomson. 



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