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*[[Potanin's Lacquer Tree]] or Chinese Varnish Tree (''Toxicodendron potaninii'' or ''Rhus potaninii'') from centr ...cies, even more virulent than poison ivy and poison oak. According to some botanists, poison sumac (''Toxicodendron vernix'') is the most [[Toxin|toxic]] plant

...d Crime]]. Retrieved on 23 February 2007</ref> "At a very early period the Chinese recognized the Cannabis plant as dioecious,"<ref>Li Hui-Lin (1973). "The Or ...a'' Vav.<ref name="hillig2004a"/><ref name = small1976a/> In 1940, Russian botanists Serebriakova and Sizov proposed a complex classification in which they also