Health & MedicalTesting for anti-HIV drugs – one indigenous plant at a timeEngela DuvenageApril 16, 2014April 14, 2014 by Engela DuvenageApril 16, 2014April 14, 2014 An indigenous grey-leaved shrub called poplar helichrysum has helped medical plant scientist Dr Heino Heyman to develop a technique that speeds up the sifting process...