Lév. & Vaniot, Bull. Soc. Bot. France 51: 292 (1904)
T: Japan, Aomori, Oct 1900, U.Faurie 4323; lecto: E, designated here [the other original syntype, Japan, Yezo, Shirotoko, 25 Aug 1893, U.Faurie 10962 (K, two specimens), belongs to Juncus beringensis. The name Juncus fauriei is not considered a later homonym of J. fauriensis, see ICBN, Art. 53.3, Ex. 10.].
Perennials, 20–50 cm tall; rhizome creeping, usually short-noded, or rarely internodes to c. 1 cm. Cataphylls 2–4; upper cataphylls c. 3–5 cm long, ±tight, abaxially pale to deep yellow-brown above, often glossy and brown at base, adaxially yellowish silvery. Stems in dense rows, leafless, subterete, ±compressed, ±twisted to flexuose or ±straight, thin, usually to 1 mm diam., deep green, shallowly, and irregularly striate; subepidermal sclerenchyma strands absent; pith continuous, of ±rounded to slightly astericiform cells. Lower bract c. (2–) 3–6 (–10) cm long, usually slightly to conspicuously longer than inflorescence, c. 1/3–1/6 as long as stem. Inflorescence pseudolateral, 2–4 (–8) cm long, usually loose, with 2–4 thin, often flexuose main branches, usually 5–10 (–14)-flowered; flowers solitary. Bracteoles ovate, acute to acuminate, to c. 1.5 mm long, scarious-yellowish. Tepals ±equal or outer ones slightly longer, (3.5–) 4.2–4.8 mm long, broadly lanceolate, acute to acuminate; central band greenish, distinct, usually bordered dark castaneous-brown to blackish brown; margins distinct, membranous. Stamens 6; anthers (1.2–) 1.4–2.0 mm long, at least 4–6× as long as c. 0.3 (–0.4) mm filaments; style c. 0.8–1.3 mm long; stigmas c. 0.8–1.4 mm long. Capsule triseptate (to almost trilocular), c. 4.5–5 mm long, ±exceeding perianth, dark brown, acute, mucronate; mucro 0.4–0.5 mm long, thick. Seeds ovoid, 0.5–0.7 × c. 0.3 mm, apiculate, (apices usually whitish); outer seed coat indistinctly sculptured. Confined to the Russian Far East and Japan. 31: KUR. 38: JAP. 38. JAPAN: Honshu, Shimousa, May 1920, T.Nakai (TI); Honshu, Ishikawa, 16 Nov 1952, N.Satomi 16377 (TI); Honshu, Ishikawa, Hakui-gun, Takamatsu, 31 May 1951, N.Satomi 16375 (TI); Honshu, Niigata, U.Faurie 173 (P); Niigata Pref., Nenzugaseki, 29 Jul 1939, [collector not transliterated from Japanese script] (TI); Honshu, Aomori Pref., Jul 1909, E.Kinashi (TI); Hokkaido, Yubutsu, U.Faurie 7206 (W); Hokkaido, Hakodate, 1926, T.Satow (TI); Aburagawa in Aomori, 18 Aug 1913, Anonymous (S); Mutsu, Kita-tsugaru, Ainchi, 20 Jun 1952, M.Furuse 20991 (S).