220 POWDERED VEGETABLE DRUGS 



18. (Fig. 37.) ARNICA. Arnica Flowers. U. S. 

 Fl. ex. 30. Tinct. 20. 



Wohlverleih, Fallkraut, Arnika, G. Arnique, Arnica, Fr. 



The flower heads of Arnica montqna L., Composite. 



Light brown. 



Fragrant, recalling gaultheria. 



Bitter, somewhat pungent. 



Pollen grains typical of the order Composite; simple, 4- to 6- 

 celled trichomes; one-celled to four-celled glandular trichomes; 

 numerous pappus remnants; epidermal cells with wavy vertical walls. 

 The most characteristic elements are the glandular trichomes. 



Ash should not exceed 8 per cent. 



Adulterated with flowers of various Compositae as Calendula, 

 Anthemis, Inula, Senecio. 



