352 
PHARMACEUTICAL BOTANY 
Official drug Part used Botanical origin Habitat 
Myrrha Gum resin Commiphora species East Africa and 
Arabia * 
Unofficial 
Olibanum Gum resin Boswellia carterii East Africa and 
Arabia 
Pig. 208. —Picrasma excelsa —Branch. (Sayre.) 
Meliacece or Mahogany Family .—Tropical trees or shrubs with 
wood often hard, colored and odoriferous. Leaves alternate, ex- 
