Chamaescilla corymbosa, commonly known as blue stars, blue squill or mudrurt, is a tuberous perennial herb species in the genus Chamaescilla. It is endemic to southern Australia.
Plants are 10 to 15 cm high and have grass-like basal leaves. The bright blue flowers have 6 petals (each with three nerves) and 6 stamens. These appear in groups of two or more are produced from August to October in the species native range. The seed capsules contain black, glossy seeds.