370 



PHARMACEUTICAL BOTANY 



Official drug Part used Botanical origin Habitat 



Helianthemum Herb Helianthemum Eastern United 



N.F. canadense States 



XX. Order Opuntiales. Cactacea or Cactus Family. Herba- 

 ceous rarely arborescent (Cereus giganteus) more or less succulent 



PIG. 218. Daphne mezereum Fruiting branch and flowers. (Sayre.} 



plants living in warm, dry (Peireskia), usually desert situations, 

 rarely becoming epiphytic and correspondingly modified. Stems 

 accordingly varying from elongate, slightly enlarged, green (Peireskia) 

 to flattened (Cereus and Opuntia), to condensed (Echinocactus , 



