Abstract
Four Baccharis species were studied for their exudate flavonoid composition. General accumulation trends observed include flavone and flavonol methyl ethers as well as flavanones and also, in part, chromenes. B. concinna was analyzed for infraspecific variability, differentiating between male and female individuals from three different habitat locations and between foliar and cauline flavonoid expression. The minute differences observed between male and female populations and those observed between cauline and foliar material did not lead to a correlation pattern. The exudate flavonoid complements observed in B. concinna, B. linearis, B. confertifolia and B. lycioides are well in agreement with literature data, of which only a few relate to exudate occurrence.