182 BOTANY. 



MARKING NUT. 



This fruit produces an indelible ink which is used for 

 marking, and for other purposes. The dried nuts are 

 constantly for sale, but I have never met with the tree 

 growing. 



Semecarpus Anacardium. 



OAK GALLS. 



Oak galls can always be obtained of the native drug- 

 gists, but I think they are all imported, although we have 

 several species of oak indigenous in the Provinces. 

 Qucrcus. 



RUELLIA. 



The Burmese cultivate a low plant as a substitute for 

 indigo which is the room of Assam, from which country 

 it has probably been introduced. It forms a blue dye not 

 inferior to that produced by the true indigo plant. 

 Rudlia indigofcra. 



&(r§8» esjljoH- esjboDjooj. oDgjScojBSii 



ASCLEPIAS BLUE DYE. 



The Karens, and sometimes the Burmese, plant a 

 creeper that is indigenous in some sections, and which 

 makes quite a good indigo blue, though not equal to the 

 ruellia dye. 



Marsdenia tinctoria. 

 Aschpias " 



INDIGO. 



The true indigo plant is grown occasionally by both Ka- 

 rens and Burmese, but less extensively than either of the 

 preceding. 



Indigoftra tinctoria. 



