Xyris platylepis, the tall yelloweyed grass, is a North American species of flowering plants in the yellow-eyed-grass family. It grows on the coastal plain of the southeastern and south-central United States from eastern Texas to Virginia.

Xyris platylepis is a perennial herb up to 10 cm (4 inches) tall with long, narrow leaves up to 50 cm (20 inches) long.

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