Ammocharis is a genus in the Amaryllidaceae family from Sub-Saharan Africa that has 5 species.
Ammocharis coranica, known as the Karoo Lily, occurs throughout the Karoo and its range extends into the eastern grassland of the summer rainfall area at altitudes between 700 and 1500 metres on flats or in depressions which are seasonally wet, although its habitat is characterised by lengthy dry periods and severe droughts. Cameron McMaster has provided extremely interesting information about this species in a 
PBS list post.
Photos below from Cameron McMaster show this species flowering after fire in grassland in the Cathcart District, flowering in habitat, growing in association with Nerine huttoniae in stony Karoo flats, and in fruit in the Willowmore district of the Karoo.
Ammocharis tinneana The range of this species includes a large number of sub-Saharan countries including Rwanda, Zaire, Chad, Ethiopia, Somalia, Sudan, Kenya, Tanzania, Uganda, Angola, Malawi, Mozambique, Zambia, Zimbabwe, Botswana, and Namibia. My plant was bought as a Kenyan form and it bloomed for the first time for us in mid-May of 2007 in Santa Barbara, California. It receives winter rainfall but acts as a summer grower. The flowers were sweetly fragrant and of a colour difficult to capture with a camera. Photo from Jacob Knecht.
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