Canna~Fangled Abstracts Chemotaxonomic features associated with flavonoids of cannabinoid-free cannabis (Cannabis sativa subsp. sativa L.) in relation to hops (Humulus lupulus L.). Nat Prod Lett. 2002 Feb;16(1):57-63. Vanhoenacker G1, Van Rompaey P, De Keukeleire D, Sandra P.…Freedom WaresFebruary 16, 2002