Juncus filicaulis Buchenau

Small, very slender tufts; rhizome short. Stems 15–30–(60) cm × 0.5–1 mm, wiry, grey- or blue-green, ridged, dull, pith regularly interrupted by comparatively large cavities. Basal sheaths closely appressed, brownish-pink below. Inflorescence c. 1 cm diam., a compact almost spherical head occasionally with 1–(3) lateral clusters. Tepals 2.5–3 mm long, ± equal, acute. Stamens 3. Capsule 2–2.5 mm long, ± = but usually slightly < tepals, oblong-obovoid, flattened at top, red-brown.

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