Agapanthus africanus was the first of the genus to be introduced to the European horticultural community by formal description in 1679. It only occurs naturally in the winter rainfall fynbos veld of the Western Cape from the Cape Peninsula as far as Swellendam in sandy, acid soil, often among sandstone rocks (www.plantzafrica.com).There is another subspecies of Agapanthus africanus which has pendulous flowers, called subspecies walshii. The one depicted is subspecies africanus. There are six to ten species of Agapanthus, depending which expert one wishes to give credence. Several of them are endemic to South Africa, but some are renowned world travellers, occurring in many gardens and nurseries. The last word about sorting out the genus has clearly not yet been written (Wikipedia).