M. Thulin (2006) Catharanthus. Flora of Somalia 3: 124.

Plants subshrubs, up to about 1 m tall; stems glabrous or pubescent. Leaf blades elliptic to obovate, 3-8.5 cm long, 0.8-4 cm wide, pubescent or glabrous, top obtuse or acute. Corollas white or pink, usually with a darker center, tubes 22-30 mm long, lobes overlapping to the left in bud; stamens included; anthers 2.3-3 mm long, subsessile; styles 16-27 mm long. Fruits green, of two cylindrical striate follicles about 2-4 cm long; seeds black.

Catharanthus roseus is native to Madagascar but is widely cultivated elsewhere in the tropics, including in both Somaliland and Somalia. 

See links

Some of the alkaloids of Catharanthus roseus are used in the treatment of leukemia in children. (Source: Thulin 2006).

Global distribution of Catharanthus roseus.

Note: GBIF records include introduced and cultivated plants. Consequently, the distribution shown often differs from statements about a taxon's native distribution.

Salah (2014) Catharanthus roseus - cancer fighting. Tropical biodiversity https://blogs.reading.ac.uk/tropical-biodiversity/2014/03/catharanthus-roseus-cancer-fighting/comment-page-1/#:~:text=Uses,et%20al.%2C%202013).

Thulin, M. (2006) Catharanthus roseus. Flora of Somalia 3: 124.