FLAVONOIDSOFTHEGENUS Bouteloua(POACEAE)FROMMEXICO

Abstract

Flavonoid contents of natural populations
of Bouteloua species from Mexico were
identified and qualitatively analized.
Nineteen flavonoids were separated and 12
were chemically identified from 30 taxa of

this genus. Most were glycosylated
derivatives of the flavones luteolin,
apigenin mono-glycosides in the 5, 6, 7 and
8 positions, and tricin mono-glycosides in
the 5 and 7 positions. Two flavonols Q 3-
O rutinoside and Q 3-O glucoside were
determined. Flavonoid patterns provided
a good additional taxonomic character for
species separation. Phenetic analysis of
flavonoid content provided support to
conclude that Bouteloua deserves a
generic level, and it is composed of two
subgenera: Bouteloua and Chondrosum.