Thirty extracts obtained from 10 endemic plant species belonging to 8 plant families used in the traditional medicine in Socotra have been tested for cytotoxic activity against FL-cells. Extracts of
Eureiandra balfourii
and
Commiphora ornifolia
showed the strongest activity against FL-cells with IC
50 < 10 μg/ml and 39.3 μg/ml respectively.