Source : Webster's Revised Unabridged Dictionary (1913)

Xyris \Xy"ris\, n. [L., a kind of Iris, Gr. ?, fr. ? a razor.]
   (Bot.)
   A genus of endogenous herbs with grassy leaves and small
   yellow flowers in short, scaly-bracted spikes; yellow-eyed
   grass. There are about seventeen species in the Atlantic
   United States.

Source : WordNet®

Xyris
     n : chiefly American marsh plants, having usually yellow flowers
         [syn: {genus Xyris}]