Agapanthus praecox Willd. is an evergreen plant from the southeastern Cape growing in stony slopes and grassland from the southeastern Cape to KwaZulu-Natal. It can be quite tall and has white to medium blue flowers with stamens as long as the tepals. The first three photos taken by Cameron McMaster in the Eastern Cape. Photos 4-6 below taken by Cameron McMaster and Bob Rutemoeller of a wild population at Satansnek Pass in the Eastern Cape. Plants were blooming with Crocosmia masoniorum.
Photo 1-4 from Mary Sue Ittner. The first was taken at Glen Avon where it was growing high on the rocks with a cyrtanthus species January 2010. Photos 2-4 were taken at Gaika's Kop January 2010. Photos 5-6 taken by Christopher Whitehouse January 2012 also at Gaika's Kop.
Photo below by Paul Tyerman of a plant in Australia that was labeled Agapanthus africanus but is likely to be A. praecox instead or a hybrid.