Sisyrinchium albidum, commonly known as white blue-eyed grass,[2] is a species of flowering plant in the family Iridaceae.

The stem of Sisyrinchium albidum is commonly pale grey and threadlike, measuring 0.2 to 0.5 m high and 0.5 to 1 mm wide.

Similarly, its narrow, stiff leaves are 0.5 to 1 mm wide.

Its twinned spathes (by which it is characterized, along with its leaves) are green and purple-tinged and 1.5 to 2 cm high.

The outer part of the flower, including the petals, is white to violet and 8–10 mm long.