Abstract
Leaf flavonoids from 73 strains ofMatricaria andTripleurospermum are compared. 7-Glucosides of quercetin, isorhamnetin and luteolin together with small amounts of chrysoeriol and apigenin 7-glucoside are typical for the two genera.Matricaria differs fromTripleurospermum by the additional occurrence of 6-hydroxyluteolin 7-glucoside as well as 7-rhamnosylglucosides of luteolin and chrysoeriol. Polyacetylene data obtained so far also confirm the generic separation. WithinTripleurospermum the occurrence of flavon 4′-glucosides and accumulation of apigenin 7-glucoside may contribute to a more natural arrangement of the species and to suggestions concerning their evolution and geographical differentiation.Tripleurospermum with its perennial species and dominating flavonol glycosides evidently occupies a more primitive position, whileMatricaria appears progressively more advanced because of flavonol reduction and 6-hydroxylation of flavones. This is well in line with the distribution and biosynthetic pathways of characteristic polyacetylenes.
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