Figure 9: HPTLC of f everfew (tracks 1 methanolic extract and 2 the same extract after defatting treatment) and Mexican feverfew (3-4, with the same treatment) and chamomile (5-6, with the same treatment ,track 7 at lower concentration ), another common adulterant of feverfew. Upper plate is visualized at 366 nm and lower plate at white light. The differences with chamomile are evident, as well as the similarities between the first two species, in accordance with their taxonomic relationship.