Romulea monadelpha is a herbaceous perennial geophyte in the family Iridaceae native to South Africa.

Romulea monadelpha is a low geophyte of 15–30 cm (5.9–11.8 in) high, with a subterranean stem that grows from a corm with a rounded base, which has a tunic with curved acuminate teeth.

Its three to five thread-like leaves grow directly out of the soil and are 1–2 mm (0.039–0.079 in) in diameter, and have four grooves along their lengths.

The trimerous flowers are without scent, burgundy red with elaborately colored blotches with black and cream in the cup, but the population around the Gannaga Pass population has salmon colored flowers and large black and light grey markings.

[3] Romulea monadelpha exclusively grows on dolerite clay in the western Karoo near the escarpments.