Naturalisation in Extra- Tropical Countries. 81 



The seeds of C. Bonducella are admitted into the Indian pharma- 

 copoea as a febrifuge ; Thwaites says that every part of the plant 

 is used medicinally in Ceylon [Dr. G. Watt]. 



Caesalpinia forevifolia, Bentham. (Balsamocarpon brevifolium, Clos.) 



Chili, the " A.lgorobillo." The pods of this shrub or small tree 

 are extraordinarily rich in tannic acid ; Godeif roy found in the 

 husks 67-68^ per cent. The process of tanning with these pods is 

 accomplished in one -third of the time required for leather from 

 oak-bark ; this material is also especially valuable as giving a bloom 

 to the leather. According to Hartwich, noteworthy also for a 

 yellow dye. 



Caesalpinia coriaria, Willdenow. 



Wet sea-shores of Central America. Might be naturalised in salt- 

 marshes elsewhere. Prospers as far south as Natal [J. M. Wood]. 

 Colonel Drury states, that each full-grown tree produces annually 

 about 100 Ibs. of pods, the husk of which, commercially known as 

 Divi-Divi, is regarded as the most powerful and quickly acting 

 tanning material in India. The mercantile price of the pods is 

 from 8 to 13 per ton. England imports about 4,000 tons 

 annually ; the bark is used for tanning. Lac is also gathered from 

 this bush [Dr. G. Watt]. 



Caesalpinia erista, Linne. 



West-Indies and Carolina. This shrub or tree furnishes a yellow 

 dye-wood. 



Caesalpinia echinata. Lamarck. 



Brazil. The Fernambuc-wood or Bed Brazil-wood is obtained 

 from this tree and allied species ; they also furnish the dye-principle 

 brazilin. 



Caesalpinia G-illiesii, Wallich. (Poinciana Gilliesii, Hooker.) 



La Plata-States. This beautiful rather hardy bush can be 

 utilized for hedges. 



Caesalpinia pulcherrima, Swartz. (Poinciana palcherrima, Linne.) 



Called " The Pride of Barbadoes," but seemingly indigenous to 

 tropical Asia. A large shrub or small tree. This brilliantly 

 ornamental prickly plant is highly adapted for hedges in any 

 climes free of frost. The nesting of ants in its trunk, while the 

 growth continues quite normally, was pointed out already by Box- 

 burgh. 





Caesalpinia Sappan, Linne. 



South- Asia. The wood furnishes a red dye, which is largely 

 exported. This shrub can also be adopted as a hedge-plant. The 

 lac-insect has recently taken to it [Watt]. 



F 



