Resumo

HERRERA ARRIETA, Yolanda  e  CHAIREZ HERNANDEZ, Isaias. FLAVONOIDS OF THE GENUS Bouteloua (POACEAE) FROM MEXICO. Polibotánica [online]. 2005, n.20, pp.17-29. ISSN 1405-2768.

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.

Palavras-chave : Poaceae; Gramineae; flavonoids; chemosystematics.