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The content of flavonols, catechins, tannins, pectin substances, saponins, carotinoids in flowers and leaves of plants of three species of the genus Filipendula Mill. growing at natural populations in the territory of the South of Western Siberia (Novosibirsk region): F. ulmaria (L.) Maxim., F. stepposa Juz and F. vulgaris Moench. is studied.
Flowers of F. ulmaria and F. stepposa contains flavonols to 9,7 and 11,3% respectively, leaves – to 5,7%. The content of tannins in flowers F. ulmaria reaches 50,5%, F. stepposa – 51,6%, F. vulgaris – 44,8%, in leaves is 1,5–1,8 times less. Catechins in leaves are 2–3 times more, than in flowers – to 713,9, 1219,8, 721,2 mg % respectively. Protopectins are present and at inflorescences – to 10,6%, and at leaves – to 6,9% whereas pectins isn't revealed. Leaves of meadowsweets are unique stores of carotinoids: they contain to 157,1 mg% (F. vulgaris) of these substances, in their inflorescences it is less (to 52,7 mg%). Рopulations of meadowsweets perspective for further chemical and pharmacological researches are allocated.