Juncus bufonius L.

Leaf sheaths tapering above. Flowers solitary on an elongated rachis or cymose or clustered in the leaf axils. Perianth segments lanceolate, acute, 3–4 mm long, as long as the capsule. Leaves up to 10 cm long, but often less than 5 cm. Annual. Widespread. Damp places. Toad Rush