TAXONOMY 



349 



pentamerous, white, yellow, red or blue (G. o/icinale). Fruit a 

 capsule. * 



Official drug 

 Guaiacum 



Guaiaci Lignum 

 N. F. 



Part used 

 Resin of wood 

 Heartwood 



Botanical origin 



Guaiacum officinale 

 Guaiacum sanctum 

 G. officinale and G. 

 sanctum 



( Guaij 

 I Guau 



Habitat 



Tropical and sub- 

 tropical America 



Tropical and sub- 

 tropical America 



PIG. 206. Citrus Auranlium Branch. (Sayre.) 



Rutacece or Rue Family. Herbs (Ruta, Diosma, Barosma) or 

 shrubs (Xanthoxylum) or trees (Citrus). Stems upright, often wiry 

 xerophytic, in sub-family Rutece, elongated and spiny in sub-family 

 Zanthoxylece, woody and green in sub-family Aurantiea. Leaves 

 alternate or oppostite, simple (Ruta), rarely whorled (Pilocarpus) or 



