FORESTRY OF WEST AFRICA. 333 



duits des Colonies Fran^aises, Exposition Universelle 

 de 1867,' p. 44. 



Distribution : Upper Guinea, North Central, Nile 

 Land. 



Nguiguis or Guiguis {Bauhinia reticulata, DC). — 

 Small spreading tree. Wood durable and easily 

 worked. Bark yields a tough fibre, used for making 

 cords in Senegal, and is also used in medicine as an 

 astringent. The seeds when burnt produce a black 

 (? blue) dye. — ' Catalogue des Produits des Colonies 

 Francaises, Exposition Universelle de 1867,' p. 44; 

 Kew Museum. 



Distribution : Upper Guinea, Nile Land, Lower 

 Guinea, Mozambique District. 



Frankincense Tree of Sierra Leone, Thievi of Sene- 

 gambia. Bumbo, Bungo or Bungbo {Daniellia tlmri- 

 fera, Bennett). — Tree 50 to 150 feet high. This tree 

 is said to yield two kinds of frankincense : the one is 

 recognised by the dark brown or black shining and 

 irregular fragments, while the other is of a lighter 

 brown or yellow tint, less compact and more friable ; 

 the lighter of the two is least valued, but both are 

 usually intermixed in samples offered for sale. The 

 bark of the tree is perforated deeply in all directions 

 by an insect termed Tumbo by the natives, the bore 

 being circular and about an inch in diameter, in 

 which the gummy matter accumulates, blended with 

 the woody fibre, and then issues from the orifice and 



