Juncus canadensis J.Gay ex Laharpe

Densely tufted perennial, strictly erect, stout. Stems 15–90 cm high, with several cauline leaves; internal septa present below inflorescence. Leaves terete, transversely-septate, septa usually evident externally. Inflorescence variable, (2)–4–12–(18) cm long. Flowers in large or small clusters of 5–20 at end of branches or in the forks. Tepals 3.5–4 mm long, very narrow, rigid, acuminate, outer very slightly < inner. Stamens 3, occasionally 4–6. Capsule 3–4.5 mm long, = or slightly > tepals, narrowed to short beak. Seeds with distinct white tails at each end.

[From: Healy and Edgar (1980) Flora of New Zealand. Volume 3.]