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 with a prophyll (bracteole) beneath it. Leaves with or without auricles
Each flower without a prophyll beneath it. Leaves without auricles, sheaths tapering above