T: Washington State, Mt Paddo, W.Suksdorf 678 [ut Juncus falcatus]; holo: W.
Perennials, c. 15–55 cm tall, loosely caespitose; rhizome long, creeping, usually with long internodes; stolons present. Stem slightly compressed, papillose. Cataphylls absent or 1–2, dull brownish, to c. 3 cm long; basal leaves few. Cauline leaves 1–3; lower leaves c. 10–25 cm long; upper leaves with blade 4–7 cm long, c. 1.5–2.5 (–4.0) mm wide; sheaths narrow, with a very narrow membranous margin; auricles ±absent or linear, subacute, to 0.5–0.7 mm long; apex subulate. Lower bract reduced, c. 0.5–2.0 cm long, ±shorter than inflorescence; middle bracts lanceolate, acuminate, to c. 6 mm long, scarious. Inflorescence a single sessile head (rarely up to 3–4 heads), globose, rarely hemispherical, 8–15 (–30)-flowered, with other heads on peduncles to c. 5 cm long. Tepals ±equal, c. 4.5–5.3 (–5.7) mm long, usually abaxially scabrid; outer tepals sometimes slightly longer, lanceolate, acute or subacute, bright castaneous, with central band green or later stramineous; inner tepals ovate-lanceolate, obtuse, broadly bordered, with margins membranous. Stamens 6; anthers 0.9–1.5 mm long; filaments 0.7–1.2 mm long; style c. 1.0–1.4 mm long; stigmas 1.5–2.5 mm long. Capsule ±ovoid, trilocular, trigonous, ±truncate with a short mucro, ±equalling perianth, c. 3.5–4.5 mm long. Seeds narrowly ellipsoid, ±pale brown, c. 0.6–0.7 × c. 0.2 mm long, or 1.4–1.8 mm long including two appendages each 0.5–0.6 mm long, ±smooth; outer seed-coat ±loose. Fig. 52.