DIV. II 



ANGIOSPERMAE 



717 



(Edelweiss), Filago. etc., the dry involucral bracts are coloured. Helianthus 

 annuus (Sunflower, Fig. 784 A), H. tuberosus (Jerusalem Artichoke). Dahlia, 

 from America and in cultivation. In Britain Bidens ; herbs with opposite 



FIG. 790. Arnica mor.tana (A nat. size). OFFICIAL. 



leaves, sometimes heterophyllous. Achillea, Milfoil ; A. moschata and A. atrata 

 are corresponding species of the Alps, the one on limestone and the other on schists. 

 Anthemis nobilis, capitula composed of disc-florets only, or with these more or 



