Juncaceae
Leaf sheaths open; seeds numerous Juncus
Leaves terete (sometimes compressed) or reduced to sheaths with the lamina as a small acute tip to the sheaths
Lamina well developed, terete or ± compressed
Leaves jointed with internal septa (incompletely so in J. prismatocarpus); inflorescence rather loose, apparently terminal, with distinct clusters of flowers or individual flowers
Leaves less than 1 mm wide. Flowers solitary or 2–4 per cluster. Perianth segments green. Plants up to 10 cm high, rarely more, tufted.
Plants tufted and bulbous, sometimes stoloniferous. Leaves filiform. Up to 4 clusters of flowers in an irregular cyme. Perianth segments green or tinted with brown, 2–3.5 mm long. Upper Blue Mts Damp places. Introd. from Europe Juncus bulbosus
Plants with underground rhizomes. Leaves linear-terete. Up to 4 clusters of flowers in an irregular cyme. Perianth segments green, 2–3 mm long. Upper Blue Mts Damp places Juncus sandwithii