title: [Relation between the growth period and quercetin content of Apocynum venetum].
mesh_terms: D002681:China; D005419:Flavonoids / Q000032:analysis*; D008516:Medicine, Chinese Traditional; D010946:Plants, Medicinal / Q000032:analysis*; D011794:Quercetin / Q000032:analysis*; D012621:Seasons
chemical_list: D005419:Flavonoids; D011794:Quercetin