Romulea monadelpha

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 : 72

5. Filaments oblong, black, fused or closely adpressed into a stout column, glabrous ...... 74. R. monadelpha

5’. Filaments tapering, pale or dark, free, usually pilose at the base ................................................................ 6