Xyridaceae >

Inner perianth segments yellow Xyridaceae
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Leaf margin not pale, smooth. Leaves terete or ± flattened at the apex
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Ovary and fruit thickened at the apex. Flower heads ± ovoid, 8–20 mm long, 5–15 mm diam.
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Lower bracts arranged in 5 rows, closely imbricate. Flower heads tapering gradually towards the base. Peduncles terete, 30–100 cm long. Leaves terete or nearly, 20–60 cm long, 1 mm wide. Widespread. In wet soil. Fl. spring–summer Xyris operculata