Juncaceae

Flowers in cymes or in dense lateral clusters Juncaceae
Leaf sheaths open; seeds numerous Juncus
Leaves flat and channelled, or if terete then less than 1 mm wide and not septate
Each flower without a prophyll beneath it. Leaves without auricles, sheaths tapering above
Stamens 3
Clusters up to 10-flowered, generally solitary or rarely 2–3 on a scape. Perianth segments green, distinctly acuminate, longer than the capsule. Leaves c. 1 mm wide, 3–5 mm long. Plants up to 8 cm high. Annual. Widespread. Seasonally damp places. Introd. from Europe Juncus capitatus
Clusters up to 8-flowered, arranged in a ± elongated or branched cyme. Perianth segments brown, acute or almost obtuse, as long as the capsule. Leaves more than 1 mm wide. Plants perennial over 10 cm high, rarely less. Widespread. Damp places Juncus planifolius