Xyris gracilis, commonly known as slender yellow-eye, is a species of flowering plant in the family Xyridaceae and is endemic to eastern Australia. It is a tufted herb with linear leaves with 5 to 8 flowering stems with bright yellow flowers.
Xyris gracilis is a tufted herb with flat, linear leaves long and wide with a sheathing base long and brown or reddish. There are usually 5 to 8 yellow inflorescences, each on flowering stems long, each inflorescence with 6 to 14 bracts arranged in 3 to 5 whorls and the flowers opening one at a time. The style is long with branches long. Flowering occurs in December and January.
Xyris gracilis was first formally described in 1810 by Robert Brown in Prodromus Florae Novae Hollandiae et Insulae Van Diemen. The specific epithet (gracilis) means "slender".
Slender yellow-eye grows in moist or swampy areas, often in heath, and is widespread on the coast and ranges of New South Wales and southern Victoria.