Cyrtanthus obliquus is one of the Cyrtanthus species called Knysna lily. Cyrtanthus elatus also carries that name.
C. obliquus also has other common names: soldier lily, justafina, umathaga (IsiZulu) and seeroogblom (Afrikaans), a name shared with several other local bulbous plants.
This is one of the harder Cyrtanthus species to grow in the garden (Gledhill, 1981; www.plantzafrica.com; www.mainlyamaryllidsgarden.com).