Romulea tortuosa

Manning, John C. & Goldblatt, Peter, 2001, the Arabian Peninsula and Socotra including new species, biological notes, and a new infrageneric classification, Adansonia (3) 23 (1), pp. 59-108 : 70

17. Basal ridge vertical, fan-shaped, much wider than the corm; outer bracts largely membranous or submembranous .............................................................................................................................. 36. R. tortuosa