TAXONOMY 
349 
pentamerous, white, yellow, red or blue ( G. officinale). Fruit a 
capsule. 
Official drug 
Guaiacum 
Part used Botanical origin 
Habitat 
Guaiaci Lignum Heartwood 
N. F. 
Resin of wood officinale f Tropical and sub- 
l Guaiacum sanctum l tropical America 
G. officinale and G. Tropical and sub¬ 
sanctum tropical America 
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 
Zanthoxyleoe, woody and green in sub-family— Aurantiece. Leaves 
alternate or oppostite, simple (Ruta), rarely whorled (Pilocarpus) or 
