POISONOUS PLANTS 



237 



All parts, especially the roots, contain mainly atropine 

 (about 0'6 per cent.), with variable proportions of the allied 



Fig. 32. — Ateopa Belladonna (Deadly Nightshade). 

 (From Smith's 'Veterinary Hygiene.') 



alkaloids. Atropine usually forms a larger proportion in 

 the old than in the young plants. 



Toxic Doses. — Poisoning by the plant is rare, in part by 

 reason of its scarcity. Cats, dogs, and birds are sensitive. 



