The Chemistry of the Genus Stevia (Asteraceae)

The morphological characteristic and the cytological studies made on the genus Stevia are described. Take into aécount that the chemistry of the genus might be useful for a more precise delimitation of their species; to establish relationships between chemistry, morphology and chromosomic number and to establish relationships with other genera of the tribe, the review of the isolated compounds from 54 species and 8 varieties already studied up 1997 is made.