Sisyrinchium angustifolium, commonly called blue-eyed grass, is a slender, grass-like perennial that typically grows in neat clumps reaching about 8 to 20 inches in height and spreading 6 to 12 inches wide. Its narrow, linear leaves resemble fine blades of grass and usually measure 4 to 12 inches long while remaining quite thin, often only about ⅛ to ¼ inch wide. The flowering stems rise just slightly above the foliage and bear small, star-shaped blossoms that are typically ½ to 1 inch across, with delicate blue to violet petals and a contrasting yellow center. These blooms appear in succession along the stems, which themselves are often lightly flattened and can reach 10 to 18 inches tall. The plant grows from short rhizomes, allowing it to slowly form small colonies over time, though it remains relatively compact compared to more aggressive spreaders. Its fine-textured foliage and modest height make it well-suited for borders, meadows, or naturalized plantings, maintaining a tidy footprint while adding subtle vertical and floral interest.