CLASSIFICATION OF ANGIOSPERMS. 



3" 



fhyllum of Columbia, and Mexican or West Indian tacamahaca 

 from Bursera tomentosa of Mexico, West Indies, and South 

 America. India Bdellium is a resin obtained from the bark of 

 Commiphora Roxburghiana of Northwestern India and Belu- 

 chistan. CoPAL-Hke resins are obtained from Canarium Ben- 

 galense (East Indian Copal) and possibly several species of 



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Fig. i6o. Myrrh plant (Commiphora abyssimca): A, young branch showing tri- 

 "foliate leaves: B, flowering and fruiting stem with thorn-like branches; C, leaf axis in which 

 occur a fruit and staminate and pistillate flowers; D, staminate flower in longitudinal 

 section; E, longitudinal section of pistillate flower; F, longitudinal section of fruit showing 

 arillus-like mesocarp and the easily dehiscent endocarp. — After Engler. 



Bursera. Black Dammar resin is obtained from Canarium ros- 

 tratum of the Molucca Islands. Olibanum or Frankincense is a 

 gum-resin obtained from several species of Boswellia of Asia and 

 Somali Land. American Olibanum or Soft Resin of Cayenne 

 exudes spontaneously from the stems of Protium heptaphyllum 

 and P- guianense. Gilead Balsam is obtained from Protium 

 altissimum and P. carana of Guiana and Brazil. Mexicvn Lin- 



