Species Acrosanthes teretifolia
Pictures from Observations
Etymology of Acrosanthes:
Gk. akros = at the tip, end; anthos = flower. The flowers appear, solitary, on a flower stalk.
Etymology of teretifolia:
From the Latin teres = 'smooth' or 'tapering' and folium = 'leaf'
Enum. Pl. Afric. Austral. 329 (1837)