**2.13** *Harrisonia abyssinica*

 *H. abyssinica* Oliv. of the family Rutaceae, is a spiny, evergreen shrub that branches from the base and can become a spreading or much-branched tree. It usually grows up to 6–13 m tall and commonly found in Tropical Africa, in the areas of Sierra Leone, Cameroon, Sudan, Ethiopia, Uganda, Kenya, Angola, Zambia and Mozambique [33]. The methanolic stem bark extract inhibited chloroquine resistant *P. falciparum* strain Dd2, with IC50 value of 4.7 ± 0.113 while in chloroquine sensitive *P. falciparum* strain 3D7, the IC50 value was 10 ± 0.114 μg/mL [35].
