Romulea vinacea

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 : 71

29. Tepals obtuse; outer tepals shiny and wine-colored on the reverse, inner pale ........................ 9. R. vinacea

29’. Tepals acute to subobtuse; outer tepals not shiny and wine-colored ........................................................ 30