Juncaceae

Flowers in cymes or in dense lateral clusters 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

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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.

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Leaves 1 mm wide or wider, usually more than 3 flowers per cluster. Tufted plants usually more than 10 cm high